Login per email token. With logout of previous account if already logged in.

lib/beet_round_server_web/controllers/user_json.ex

@@ -15,9 +15,6 @@ defmodule BeetRoundServerWeb.UserJSON do
     %{data: %{email: user.email, id: user.id, token: encoded_token}}
   end
 
-  @doc """
-  Renders a single user.
-  """
   def show(%{user: user}) do
     %{data: data(user)}
   end

lib/beet_round_server_web/controllers/user_session_controller.ex

@@ -12,6 +12,23 @@ defmodule BeetRoundServerWeb.UserSessionController do
     create(conn, params, "Welcome back!")
   end
 
+  def login(conn, %{"token" => token}) do
+    IO.puts("Login via token:")
+    IO.inspect(token)
+
+    UserAuth.log_out_user_without_redirect(conn)
+
+    if user = Accounts.get_user_by_email_token(token) do
+      conn
+      |> put_flash(:info, "Login successful!")
+      |> UserAuth.log_in_without_creating_cookie(user)
+    else
+      conn
+      |> put_flash(:error, "Invalid token")
+      |> redirect(to: ~p"/")
+    end
+  end
+
   # magic link login
   defp create(conn, %{"user" => %{"token" => token} = user_params}, info) do
     case Accounts.login_user_by_magic_link(token) do