diff --git a/lib/pleroma/web/api_spec/operations/account_operation.ex b/lib/pleroma/web/api_spec/operations/account_operation.ex
new file mode 100644
index 000000000..9085f1af1
--- /dev/null
+++ b/lib/pleroma/web/api_spec/operations/account_operation.ex
@@ -0,0 +1,68 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ApiSpec.AccountOperation do
+  alias OpenApiSpex.Operation
+  alias Pleroma.Web.ApiSpec.Schemas.AccountCreateRequest
+  alias Pleroma.Web.ApiSpec.Schemas.AccountCreateResponse
+  alias Pleroma.Web.ApiSpec.Helpers
+
+  @spec open_api_operation(atom) :: Operation.t()
+  def open_api_operation(action) do
+    operation = String.to_existing_atom("#{action}_operation")
+    apply(__MODULE__, operation, [])
+  end
+
+  @spec create_operation() :: Operation.t()
+  def create_operation do
+    %Operation{
+      tags: ["accounts"],
+      summary: "Register an account",
+      description:
+        "Creates a user and account records. Returns an account access token for the app that initiated the request. The app should save this token for later, and should wait for the user to confirm their account by clicking a link in their email inbox.",
+      operationId: "AccountController.create",
+      requestBody: Helpers.request_body("Parameters", AccountCreateRequest, required: true),
+      responses: %{
+        200 => Operation.response("Account", "application/json", AccountCreateResponse)
+      }
+    }
+  end
+
+  def verify_credentials_operation do
+    :ok
+  end
+
+  def update_credentials_operation do
+    :ok
+  end
+
+  def relationships_operation do
+    :ok
+  end
+
+  def show_operation do
+    :ok
+  end
+
+  def statuses_operation do
+    :ok
+  end
+
+  def followers_operation do
+    :ok
+  end
+
+  def following_operation, do: :ok
+  def lists_operation, do: :ok
+  def follow_operation, do: :ok
+  def unfollow_operation, do: :ok
+  def mute_operation, do: :ok
+  def unmute_operation, do: :ok
+  def block_operation, do: :ok
+  def unblock_operation, do: :ok
+  def follows_operation, do: :ok
+  def mutes_operation, do: :ok
+  def blocks_operation, do: :ok
+  def endorsements_operation, do: :ok
+end
diff --git a/lib/pleroma/web/api_spec/render_error.ex b/lib/pleroma/web/api_spec/render_error.ex
new file mode 100644
index 000000000..e063d115b
--- /dev/null
+++ b/lib/pleroma/web/api_spec/render_error.ex
@@ -0,0 +1,27 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ApiSpec.RenderError do
+  @behaviour Plug
+
+  alias Plug.Conn
+  alias OpenApiSpex.Plug.JsonRenderError
+
+  @impl Plug
+  def init(opts), do: opts
+
+  @impl Plug
+
+  def call(%{private: %{open_api_spex: %{operation_id: "AccountController.create"}}} = conn, _) do
+    conn
+    |> Conn.put_status(:bad_request)
+    |> Phoenix.Controller.json(%{"error" => "Missing parameters"})
+  end
+
+  def call(conn, reason) do
+    opts = JsonRenderError.init(reason)
+
+    JsonRenderError.call(conn, opts)
+  end
+end
diff --git a/lib/pleroma/web/api_spec/schemas/account_create_request.ex b/lib/pleroma/web/api_spec/schemas/account_create_request.ex
new file mode 100644
index 000000000..398e2d613
--- /dev/null
+++ b/lib/pleroma/web/api_spec/schemas/account_create_request.ex
@@ -0,0 +1,56 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ApiSpec.Schemas.AccountCreateRequest do
+  alias OpenApiSpex.Schema
+  require OpenApiSpex
+
+  OpenApiSpex.schema(%{
+    title: "AccountCreateRequest",
+    description: "POST body for creating an account",
+    type: :object,
+    properties: %{
+      reason: %Schema{
+        type: :string,
+        description:
+          "Text that will be reviewed by moderators if registrations require manual approval"
+      },
+      username: %Schema{type: :string, description: "The desired username for the account"},
+      email: %Schema{
+        type: :string,
+        description:
+          "The email address to be used for login. Required when `account_activation_required` is enabled.",
+        format: :email
+      },
+      password: %Schema{type: :string, description: "The password to be used for login"},
+      agreement: %Schema{
+        type: :boolean,
+        description:
+          "Whether the user agrees to the local rules, terms, and policies. These should be presented to the user in order to allow them to consent before setting this parameter to TRUE."
+      },
+      locale: %Schema{
+        type: :string,
+        description: "The language of the confirmation email that will be sent"
+      },
+      # Pleroma-specific properties:
+      fullname: %Schema{type: :string, description: "Full name"},
+      bio: %Schema{type: :string, description: "Bio", default: ""},
+      captcha_solution: %Schema{type: :string, description: "Provider-specific captcha solution"},
+      captcha_token: %Schema{type: :string, description: "Provider-specific captcha token"},
+      captcha_answer_data: %Schema{type: :string, description: "Provider-specific captcha data"},
+      token: %Schema{
+        type: :string,
+        description: "Invite token required when the registrations aren't public"
+      }
+    },
+    required: [:username, :password, :agreement],
+    example: %{
+      "username" => "cofe",
+      "email" => "cofe@example.com",
+      "password" => "secret",
+      "agreement" => "true",
+      "bio" => "☕️"
+    }
+  })
+end
diff --git a/lib/pleroma/web/api_spec/schemas/account_create_response.ex b/lib/pleroma/web/api_spec/schemas/account_create_response.ex
new file mode 100644
index 000000000..f41a034c0
--- /dev/null
+++ b/lib/pleroma/web/api_spec/schemas/account_create_response.ex
@@ -0,0 +1,29 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ApiSpec.Schemas.AccountCreateResponse do
+  alias OpenApiSpex.Schema
+
+  require OpenApiSpex
+
+  OpenApiSpex.schema(%{
+    title: "AccountCreateResponse",
+    description: "Response schema for an account",
+    type: :object,
+    properties: %{
+      token_type: %Schema{type: :string},
+      access_token: %Schema{type: :string},
+      scope: %Schema{type: :array, items: %Schema{type: :string}},
+      created_at: %Schema{type: :integer}
+    },
+    example: %{
+      "JSON" => %{
+        "access_token" => "i9hAVVzGld86Pl5JtLtizKoXVvtTlSCJvwaugCxvZzk",
+        "created_at" => 1_585_918_714,
+        "scope" => ["read", "write", "follow", "push"],
+        "token_type" => "Bearer"
+      }
+    }
+  })
+end
diff --git a/lib/pleroma/web/mastodon_api/controllers/account_controller.ex b/lib/pleroma/web/mastodon_api/controllers/account_controller.ex
index 7da1a11f6..eb082daf8 100644
--- a/lib/pleroma/web/mastodon_api/controllers/account_controller.ex
+++ b/lib/pleroma/web/mastodon_api/controllers/account_controller.ex
@@ -80,27 +80,33 @@ defmodule Pleroma.Web.MastodonAPI.AccountController do
   plug(RateLimiter, [name: :app_account_creation] when action == :create)
   plug(:assign_account_by_id when action in @needs_account)
 
+  plug(
+    OpenApiSpex.Plug.CastAndValidate,
+    [render_error: Pleroma.Web.ApiSpec.RenderError] when action == :create
+  )
+
   action_fallback(Pleroma.Web.MastodonAPI.FallbackController)
 
+  defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.AccountOperation
+
   @doc "POST /api/v1/accounts"
-  def create(
-        %{assigns: %{app: app}} = conn,
-        %{"username" => nickname, "password" => _, "agreement" => true} = params
-      ) do
+  def create(%{assigns: %{app: app}, body_params: params} = conn, _params) do
     params =
       params
       |> Map.take([
-        "email",
-        "captcha_solution",
-        "captcha_token",
-        "captcha_answer_data",
-        "token",
-        "password"
+        :email,
+        :bio,
+        :captcha_solution,
+        :captcha_token,
+        :captcha_answer_data,
+        :token,
+        :password,
+        :fullname
       ])
-      |> Map.put("nickname", nickname)
-      |> Map.put("fullname", params["fullname"] || nickname)
-      |> Map.put("bio", params["bio"] || "")
-      |> Map.put("confirm", params["password"])
+      |> Map.put(:nickname, params.username)
+      |> Map.put(:fullname, params.fullname || params.username)
+      |> Map.put(:bio, params.bio || "")
+      |> Map.put(:confirm, params.password)
 
     with :ok <- validate_email_param(params),
          {:ok, user} <- TwitterAPI.register_user(params, need_confirmation: true),
@@ -124,7 +130,7 @@ def create(conn, _) do
     render_error(conn, :forbidden, "Invalid credentials")
   end
 
-  defp validate_email_param(%{"email" => _}), do: :ok
+  defp validate_email_param(%{:email => email}) when not is_nil(email), do: :ok
 
   defp validate_email_param(_) do
     case Pleroma.Config.get([:instance, :account_activation_required]) do
diff --git a/lib/pleroma/web/twitter_api/twitter_api.ex b/lib/pleroma/web/twitter_api/twitter_api.ex
index f9c0994da..37be48b5a 100644
--- a/lib/pleroma/web/twitter_api/twitter_api.ex
+++ b/lib/pleroma/web/twitter_api/twitter_api.ex
@@ -12,72 +12,56 @@ defmodule Pleroma.Web.TwitterAPI.TwitterAPI do
   require Pleroma.Constants
 
   def register_user(params, opts \\ []) do
-    token = params["token"]
+    params =
+      params
+      |> Map.take([
+        :nickname,
+        :password,
+        :captcha_solution,
+        :captcha_token,
+        :captcha_answer_data,
+        :token,
+        :email
+      ])
+      |> Map.put(:bio, User.parse_bio(params[:bio] || ""))
+      |> Map.put(:name, params.fullname)
+      |> Map.put(:password_confirmation, params[:confirm])
 
-    params = %{
-      nickname: params["nickname"],
-      name: params["fullname"],
-      bio: User.parse_bio(params["bio"]),
-      email: params["email"],
-      password: params["password"],
-      password_confirmation: params["confirm"],
-      captcha_solution: params["captcha_solution"],
-      captcha_token: params["captcha_token"],
-      captcha_answer_data: params["captcha_answer_data"]
-    }
+    case validate_captcha(params) do
+      :ok ->
+        if Pleroma.Config.get([:instance, :registrations_open]) do
+          create_user(params, opts)
+        else
+          create_user_with_invite(params, opts)
+        end
 
-    captcha_enabled = Pleroma.Config.get([Pleroma.Captcha, :enabled])
-    # true if captcha is disabled or enabled and valid, false otherwise
-    captcha_ok =
-      if not captcha_enabled do
-        :ok
-      else
-        Pleroma.Captcha.validate(
-          params[:captcha_token],
-          params[:captcha_solution],
-          params[:captcha_answer_data]
-        )
-      end
-
-    # Captcha invalid
-    if captcha_ok != :ok do
-      {:error, error} = captcha_ok
-      # I have no idea how this error handling works
-      {:error, %{error: Jason.encode!(%{captcha: [error]})}}
-    else
-      registration_process(
-        params,
-        %{
-          registrations_open: Pleroma.Config.get([:instance, :registrations_open]),
-          token: token
-        },
-        opts
-      )
+      {:error, error} ->
+        # I have no idea how this error handling works
+        {:error, %{error: Jason.encode!(%{captcha: [error]})}}
     end
   end
 
-  defp registration_process(params, %{registrations_open: true}, opts) do
-    create_user(params, opts)
+  defp validate_captcha(params) do
+    if Pleroma.Config.get([Pleroma.Captcha, :enabled]) do
+      Pleroma.Captcha.validate(
+        params.captcha_token,
+        params.captcha_solution,
+        params.captcha_answer_data
+      )
+    else
+      :ok
+    end
   end
 
-  defp registration_process(params, %{token: token}, opts) do
-    invite =
-      unless is_nil(token) do
-        Repo.get_by(UserInviteToken, %{token: token})
-      end
-
-    valid_invite? = invite && UserInviteToken.valid_invite?(invite)
-
-    case invite do
-      nil ->
-        {:error, "Invalid token"}
-
-      invite when valid_invite? ->
-        UserInviteToken.update_usage!(invite)
-        create_user(params, opts)
-
-      _ ->
-        {:error, "Expired token"}
+  defp create_user_with_invite(params, opts) do
+    with %{token: token} when is_binary(token) <- params,
+         %UserInviteToken{} = invite <- Repo.get_by(UserInviteToken, %{token: token}),
+         true <- UserInviteToken.valid_invite?(invite) do
+      UserInviteToken.update_usage!(invite)
+      create_user(params, opts)
+    else
+      nil -> {:error, "Invalid token"}
+      _ -> {:error, "Expired token"}
     end
   end
 
diff --git a/test/web/api_spec/account_operation_test.exs b/test/web/api_spec/account_operation_test.exs
new file mode 100644
index 000000000..4f8d04698
--- /dev/null
+++ b/test/web/api_spec/account_operation_test.exs
@@ -0,0 +1,48 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ApiSpec.AccountOperationTest do
+  use Pleroma.Web.ConnCase, async: true
+
+  alias Pleroma.Web.ApiSpec
+  alias Pleroma.Web.ApiSpec.Schemas.AccountCreateRequest
+  alias Pleroma.Web.ApiSpec.Schemas.AccountCreateResponse
+
+  import OpenApiSpex.TestAssertions
+  import Pleroma.Factory
+
+  test "AccountCreateRequest example matches schema" do
+    api_spec = ApiSpec.spec()
+    schema = AccountCreateRequest.schema()
+    assert_schema(schema.example, "AccountCreateRequest", api_spec)
+  end
+
+  test "AccountCreateResponse example matches schema" do
+    api_spec = ApiSpec.spec()
+    schema = AccountCreateResponse.schema()
+    assert_schema(schema.example, "AccountCreateResponse", api_spec)
+  end
+
+  test "AccountController produces a AccountCreateResponse", %{conn: conn} do
+    api_spec = ApiSpec.spec()
+    app_token = insert(:oauth_token, user: nil)
+
+    json =
+      conn
+      |> put_req_header("authorization", "Bearer " <> app_token.token)
+      |> put_req_header("content-type", "application/json")
+      |> post(
+        "/api/v1/accounts",
+        %{
+          username: "foo",
+          email: "bar@example.org",
+          password: "qwerty",
+          agreement: true
+        }
+      )
+      |> json_response(200)
+
+    assert_schema(json, "AccountCreateResponse", api_spec)
+  end
+end
diff --git a/test/web/mastodon_api/controllers/account_controller_test.exs b/test/web/mastodon_api/controllers/account_controller_test.exs
index a450a732c..6fe46af3c 100644
--- a/test/web/mastodon_api/controllers/account_controller_test.exs
+++ b/test/web/mastodon_api/controllers/account_controller_test.exs
@@ -830,6 +830,7 @@ test "Account registration via Application", %{conn: conn} do
 
       conn =
         build_conn()
+        |> put_req_header("content-type", "multipart/form-data")
         |> put_req_header("authorization", "Bearer " <> token)
         |> post("/api/v1/accounts", %{
           username: "lain",
@@ -858,11 +859,12 @@ test "returns error when user already registred", %{conn: conn, valid_params: va
       _user = insert(:user, email: "lain@example.org")
       app_token = insert(:oauth_token, user: nil)
 
-      conn =
+      res =
         conn
         |> put_req_header("authorization", "Bearer " <> app_token.token)
+        |> put_req_header("content-type", "application/json")
+        |> post("/api/v1/accounts", valid_params)
 
-      res = post(conn, "/api/v1/accounts", valid_params)
       assert json_response(res, 400) == %{"error" => "{\"email\":[\"has already been taken\"]}"}
     end
 
@@ -872,7 +874,10 @@ test "returns bad_request if missing required params", %{
     } do
       app_token = insert(:oauth_token, user: nil)
 
-      conn = put_req_header(conn, "authorization", "Bearer " <> app_token.token)
+      conn =
+        conn
+        |> put_req_header("authorization", "Bearer " <> app_token.token)
+        |> put_req_header("content-type", "application/json")
 
       res = post(conn, "/api/v1/accounts", valid_params)
       assert json_response(res, 200)
@@ -897,7 +902,11 @@ test "returns bad_request if missing email params when :account_activation_requi
       Pleroma.Config.put([:instance, :account_activation_required], true)
 
       app_token = insert(:oauth_token, user: nil)
-      conn = put_req_header(conn, "authorization", "Bearer " <> app_token.token)
+
+      conn =
+        conn
+        |> put_req_header("authorization", "Bearer " <> app_token.token)
+        |> put_req_header("content-type", "application/json")
 
       res =
         conn
@@ -920,6 +929,7 @@ test "allow registration without an email", %{conn: conn, valid_params: valid_pa
 
       res =
         conn
+        |> put_req_header("content-type", "application/json")
         |> Map.put(:remote_ip, {127, 0, 0, 7})
         |> post("/api/v1/accounts", Map.delete(valid_params, :email))
 
@@ -932,6 +942,7 @@ test "allow registration with an empty email", %{conn: conn, valid_params: valid
 
       res =
         conn
+        |> put_req_header("content-type", "application/json")
         |> Map.put(:remote_ip, {127, 0, 0, 8})
         |> post("/api/v1/accounts", Map.put(valid_params, :email, ""))
 
@@ -939,9 +950,12 @@ test "allow registration with an empty email", %{conn: conn, valid_params: valid
     end
 
     test "returns forbidden if token is invalid", %{conn: conn, valid_params: valid_params} do
-      conn = put_req_header(conn, "authorization", "Bearer " <> "invalid-token")
+      res =
+        conn
+        |> put_req_header("authorization", "Bearer " <> "invalid-token")
+        |> put_req_header("content-type", "multipart/form-data")
+        |> post("/api/v1/accounts", valid_params)
 
-      res = post(conn, "/api/v1/accounts", valid_params)
       assert json_response(res, 403) == %{"error" => "Invalid credentials"}
     end
   end
@@ -956,10 +970,12 @@ test "respects rate limit setting", %{conn: conn} do
         conn
         |> put_req_header("authorization", "Bearer " <> app_token.token)
         |> Map.put(:remote_ip, {15, 15, 15, 15})
+        |> put_req_header("content-type", "multipart/form-data")
 
       for i <- 1..2 do
         conn =
-          post(conn, "/api/v1/accounts", %{
+          conn
+          |> post("/api/v1/accounts", %{
             username: "#{i}lain",
             email: "#{i}lain@example.org",
             password: "PlzDontHackLain",
diff --git a/test/web/twitter_api/twitter_api_test.exs b/test/web/twitter_api/twitter_api_test.exs
index f6e13b661..7926a0757 100644
--- a/test/web/twitter_api/twitter_api_test.exs
+++ b/test/web/twitter_api/twitter_api_test.exs
@@ -18,11 +18,11 @@ defmodule Pleroma.Web.TwitterAPI.TwitterAPITest do
 
   test "it registers a new user and returns the user." do
     data = %{
-      "nickname" => "lain",
-      "email" => "lain@wired.jp",
-      "fullname" => "lain iwakura",
-      "password" => "bear",
-      "confirm" => "bear"
+      :nickname => "lain",
+      :email => "lain@wired.jp",
+      :fullname => "lain iwakura",
+      :password => "bear",
+      :confirm => "bear"
     }
 
     {:ok, user} = TwitterAPI.register_user(data)
@@ -35,12 +35,12 @@ test "it registers a new user and returns the user." do
 
   test "it registers a new user with empty string in bio and returns the user." do
     data = %{
-      "nickname" => "lain",
-      "email" => "lain@wired.jp",
-      "fullname" => "lain iwakura",
-      "bio" => "",
-      "password" => "bear",
-      "confirm" => "bear"
+      :nickname => "lain",
+      :email => "lain@wired.jp",
+      :fullname => "lain iwakura",
+      :bio => "",
+      :password => "bear",
+      :confirm => "bear"
     }
 
     {:ok, user} = TwitterAPI.register_user(data)
@@ -60,12 +60,12 @@ test "it sends confirmation email if :account_activation_required is specified i
     end
 
     data = %{
-      "nickname" => "lain",
-      "email" => "lain@wired.jp",
-      "fullname" => "lain iwakura",
-      "bio" => "",
-      "password" => "bear",
-      "confirm" => "bear"
+      :nickname => "lain",
+      :email => "lain@wired.jp",
+      :fullname => "lain iwakura",
+      :bio => "",
+      :password => "bear",
+      :confirm => "bear"
     }
 
     {:ok, user} = TwitterAPI.register_user(data)
@@ -87,23 +87,23 @@ test "it sends confirmation email if :account_activation_required is specified i
 
   test "it registers a new user and parses mentions in the bio" do
     data1 = %{
-      "nickname" => "john",
-      "email" => "john@gmail.com",
-      "fullname" => "John Doe",
-      "bio" => "test",
-      "password" => "bear",
-      "confirm" => "bear"
+      :nickname => "john",
+      :email => "john@gmail.com",
+      :fullname => "John Doe",
+      :bio => "test",
+      :password => "bear",
+      :confirm => "bear"
     }
 
     {:ok, user1} = TwitterAPI.register_user(data1)
 
     data2 = %{
-      "nickname" => "lain",
-      "email" => "lain@wired.jp",
-      "fullname" => "lain iwakura",
-      "bio" => "@john test",
-      "password" => "bear",
-      "confirm" => "bear"
+      :nickname => "lain",
+      :email => "lain@wired.jp",
+      :fullname => "lain iwakura",
+      :bio => "@john test",
+      :password => "bear",
+      :confirm => "bear"
     }
 
     {:ok, user2} = TwitterAPI.register_user(data2)
@@ -123,13 +123,13 @@ test "returns user on success" do
       {:ok, invite} = UserInviteToken.create_invite()
 
       data = %{
-        "nickname" => "vinny",
-        "email" => "pasta@pizza.vs",
-        "fullname" => "Vinny Vinesauce",
-        "bio" => "streamer",
-        "password" => "hiptofbees",
-        "confirm" => "hiptofbees",
-        "token" => invite.token
+        :nickname => "vinny",
+        :email => "pasta@pizza.vs",
+        :fullname => "Vinny Vinesauce",
+        :bio => "streamer",
+        :password => "hiptofbees",
+        :confirm => "hiptofbees",
+        :token => invite.token
       }
 
       {:ok, user} = TwitterAPI.register_user(data)
@@ -145,13 +145,13 @@ test "returns user on success" do
 
     test "returns error on invalid token" do
       data = %{
-        "nickname" => "GrimReaper",
-        "email" => "death@reapers.afterlife",
-        "fullname" => "Reaper Grim",
-        "bio" => "Your time has come",
-        "password" => "scythe",
-        "confirm" => "scythe",
-        "token" => "DudeLetMeInImAFairy"
+        :nickname => "GrimReaper",
+        :email => "death@reapers.afterlife",
+        :fullname => "Reaper Grim",
+        :bio => "Your time has come",
+        :password => "scythe",
+        :confirm => "scythe",
+        :token => "DudeLetMeInImAFairy"
       }
 
       {:error, msg} = TwitterAPI.register_user(data)
@@ -165,13 +165,13 @@ test "returns error on expired token" do
       UserInviteToken.update_invite!(invite, used: true)
 
       data = %{
-        "nickname" => "GrimReaper",
-        "email" => "death@reapers.afterlife",
-        "fullname" => "Reaper Grim",
-        "bio" => "Your time has come",
-        "password" => "scythe",
-        "confirm" => "scythe",
-        "token" => invite.token
+        :nickname => "GrimReaper",
+        :email => "death@reapers.afterlife",
+        :fullname => "Reaper Grim",
+        :bio => "Your time has come",
+        :password => "scythe",
+        :confirm => "scythe",
+        :token => invite.token
       }
 
       {:error, msg} = TwitterAPI.register_user(data)
@@ -186,16 +186,16 @@ test "returns error on expired token" do
 
     setup do
       data = %{
-        "nickname" => "vinny",
-        "email" => "pasta@pizza.vs",
-        "fullname" => "Vinny Vinesauce",
-        "bio" => "streamer",
-        "password" => "hiptofbees",
-        "confirm" => "hiptofbees"
+        :nickname => "vinny",
+        :email => "pasta@pizza.vs",
+        :fullname => "Vinny Vinesauce",
+        :bio => "streamer",
+        :password => "hiptofbees",
+        :confirm => "hiptofbees"
       }
 
       check_fn = fn invite ->
-        data = Map.put(data, "token", invite.token)
+        data = Map.put(data, :token, invite.token)
         {:ok, user} = TwitterAPI.register_user(data)
         fetched_user = User.get_cached_by_nickname("vinny")
 
@@ -250,13 +250,13 @@ test "returns user on success, after him registration fails" do
       UserInviteToken.update_invite!(invite, uses: 99)
 
       data = %{
-        "nickname" => "vinny",
-        "email" => "pasta@pizza.vs",
-        "fullname" => "Vinny Vinesauce",
-        "bio" => "streamer",
-        "password" => "hiptofbees",
-        "confirm" => "hiptofbees",
-        "token" => invite.token
+        :nickname => "vinny",
+        :email => "pasta@pizza.vs",
+        :fullname => "Vinny Vinesauce",
+        :bio => "streamer",
+        :password => "hiptofbees",
+        :confirm => "hiptofbees",
+        :token => invite.token
       }
 
       {:ok, user} = TwitterAPI.register_user(data)
@@ -269,13 +269,13 @@ test "returns user on success, after him registration fails" do
                AccountView.render("show.json", %{user: fetched_user})
 
       data = %{
-        "nickname" => "GrimReaper",
-        "email" => "death@reapers.afterlife",
-        "fullname" => "Reaper Grim",
-        "bio" => "Your time has come",
-        "password" => "scythe",
-        "confirm" => "scythe",
-        "token" => invite.token
+        :nickname => "GrimReaper",
+        :email => "death@reapers.afterlife",
+        :fullname => "Reaper Grim",
+        :bio => "Your time has come",
+        :password => "scythe",
+        :confirm => "scythe",
+        :token => invite.token
       }
 
       {:error, msg} = TwitterAPI.register_user(data)
@@ -292,13 +292,13 @@ test "returns user on success" do
       {:ok, invite} = UserInviteToken.create_invite(%{expires_at: Date.utc_today(), max_use: 100})
 
       data = %{
-        "nickname" => "vinny",
-        "email" => "pasta@pizza.vs",
-        "fullname" => "Vinny Vinesauce",
-        "bio" => "streamer",
-        "password" => "hiptofbees",
-        "confirm" => "hiptofbees",
-        "token" => invite.token
+        :nickname => "vinny",
+        :email => "pasta@pizza.vs",
+        :fullname => "Vinny Vinesauce",
+        :bio => "streamer",
+        :password => "hiptofbees",
+        :confirm => "hiptofbees",
+        :token => invite.token
       }
 
       {:ok, user} = TwitterAPI.register_user(data)
@@ -317,13 +317,13 @@ test "error after max uses" do
       UserInviteToken.update_invite!(invite, uses: 99)
 
       data = %{
-        "nickname" => "vinny",
-        "email" => "pasta@pizza.vs",
-        "fullname" => "Vinny Vinesauce",
-        "bio" => "streamer",
-        "password" => "hiptofbees",
-        "confirm" => "hiptofbees",
-        "token" => invite.token
+        :nickname => "vinny",
+        :email => "pasta@pizza.vs",
+        :fullname => "Vinny Vinesauce",
+        :bio => "streamer",
+        :password => "hiptofbees",
+        :confirm => "hiptofbees",
+        :token => invite.token
       }
 
       {:ok, user} = TwitterAPI.register_user(data)
@@ -335,13 +335,13 @@ test "error after max uses" do
                AccountView.render("show.json", %{user: fetched_user})
 
       data = %{
-        "nickname" => "GrimReaper",
-        "email" => "death@reapers.afterlife",
-        "fullname" => "Reaper Grim",
-        "bio" => "Your time has come",
-        "password" => "scythe",
-        "confirm" => "scythe",
-        "token" => invite.token
+        :nickname => "GrimReaper",
+        :email => "death@reapers.afterlife",
+        :fullname => "Reaper Grim",
+        :bio => "Your time has come",
+        :password => "scythe",
+        :confirm => "scythe",
+        :token => invite.token
       }
 
       {:error, msg} = TwitterAPI.register_user(data)
@@ -355,13 +355,13 @@ test "returns error on overdue date" do
         UserInviteToken.create_invite(%{expires_at: Date.add(Date.utc_today(), -1), max_use: 100})
 
       data = %{
-        "nickname" => "GrimReaper",
-        "email" => "death@reapers.afterlife",
-        "fullname" => "Reaper Grim",
-        "bio" => "Your time has come",
-        "password" => "scythe",
-        "confirm" => "scythe",
-        "token" => invite.token
+        :nickname => "GrimReaper",
+        :email => "death@reapers.afterlife",
+        :fullname => "Reaper Grim",
+        :bio => "Your time has come",
+        :password => "scythe",
+        :confirm => "scythe",
+        :token => invite.token
       }
 
       {:error, msg} = TwitterAPI.register_user(data)
@@ -377,13 +377,13 @@ test "returns error on with overdue date and after max" do
       UserInviteToken.update_invite!(invite, uses: 100)
 
       data = %{
-        "nickname" => "GrimReaper",
-        "email" => "death@reapers.afterlife",
-        "fullname" => "Reaper Grim",
-        "bio" => "Your time has come",
-        "password" => "scythe",
-        "confirm" => "scythe",
-        "token" => invite.token
+        :nickname => "GrimReaper",
+        :email => "death@reapers.afterlife",
+        :fullname => "Reaper Grim",
+        :bio => "Your time has come",
+        :password => "scythe",
+        :confirm => "scythe",
+        :token => invite.token
       }
 
       {:error, msg} = TwitterAPI.register_user(data)
@@ -395,11 +395,11 @@ test "returns error on with overdue date and after max" do
 
   test "it returns the error on registration problems" do
     data = %{
-      "nickname" => "lain",
-      "email" => "lain@wired.jp",
-      "fullname" => "lain iwakura",
-      "bio" => "close the world.",
-      "password" => "bear"
+      :nickname => "lain",
+      :email => "lain@wired.jp",
+      :fullname => "lain iwakura",
+      :bio => "close the world.",
+      :password => "bear"
     }
 
     {:error, error_object} = TwitterAPI.register_user(data)