Add integer casts.

lib/pleroma/web/twitter_api/twitter_api_controller.ex

@@ -472,7 +472,7 @@ def external_profile(%{assigns: %{user: current_user}} = conn, %{"profileurl" =>
   end
 
   def followers(%{assigns: %{user: for_user}} = conn, params) do
-    page = params["page"] || 1
+    {:ok, page} = Ecto.Type.cast(:integer, params["page"] || 1)
 
     with {:ok, user} <- TwitterAPI.get_user(for_user, params),
          {:ok, followers} <- User.get_followers(user, page) do
@@ -492,7 +492,7 @@ def followers(%{assigns: %{user: for_user}} = conn, params) do
   end
 
   def friends(%{assigns: %{user: for_user}} = conn, params) do
-    page = params["page"] || 1
+    {:ok, page} = Ecto.Type.cast(:integer, params["page"] || 1)
 
     with {:ok, user} <- TwitterAPI.get_user(conn.assigns[:user], params),
          {:ok, friends} <- User.get_friends(user, page) do

test/web/twitter_api/twitter_api_controller_test.exs

@@ -1101,7 +1101,7 @@ test "it returns 20 followers per page", %{conn: conn} do
       res_conn =
         conn
         |> assign(:user, user)
-        |> get("/api/statuses/followers", %{page: 2})
+        |> get("/api/statuses/followers?page=2")
 
       result = json_response(res_conn, 200)
       assert length(result) == 1