Flaky test: create/2 creates a token with correct email/password and TOTP code

[taobojlen]

  1) test create/2 creates a token with correct email/password and TOTP code (ShroudWeb.Api.V1.TokenControllerTest)
     test/shroud_web/controllers/api/v1/token_controller_test.exs:26
     ** (ArgumentError) errors were found at the given arguments:

       * 1st argument: not a nonempty list

     code: token = hd(Repo.preload(user, :user_tokens).user_tokens).token
     stacktrace:
       :erlang.hd([])
       test/shroud_web/controllers/api/v1/token_controller_test.exs:41: (test)