Update the API Authentication.

test/support/fixtures/accounts_fixtures.ex

@@ -4,6 +4,13 @@ defmodule LinkShortener.AccountsFixtures do
   entities via the `LinkShortener.Accounts` context.
   """
 
+  alias LinkShortener.Accounts
+  alias LinkShortener.Accounts.User
+  alias LinkShortenerWeb.Auth.Guardian
+
+  @doc """
+  Generate a unique user email.
+  """
   def unique_user_email, do: "user#{System.unique_integer()}@example.com"
   def valid_user_password, do: "hello world!"
 
@@ -23,6 +30,18 @@ defmodule LinkShortener.AccountsFixtures do
     user
   end
 
+  def user_token_fixture(attrs \\ %{}) do
+    user_params = %{
+      email: "user@mail.com",
+      password: "some password"
+    }
+
+    {:ok, %User{} = user} = Accounts.register_user(user_params)
+    {:ok, token, _claims} = Guardian.encode_and_sign(user)
+
+    token
+  end
+
   def extract_user_token(fun) do
     {:ok, captured_email} = fun.(&"[TOKEN]#{&1}[TOKEN]")
     [_, token | _] = String.split(captured_email.text_body, "[TOKEN]")