Username: user-unexistent@example.com
== Provider selection ==
  1. local
  2. ExampleBroker
Or enter 'r' to go back to user selection
Choose your provider:
> 2
PAM Error Message: user "user-unexistent@example.com" does not exist
PAM ChangeAuthTok()
  User: "user-unexistent@example.com"
  Result: error: PAM exit code: 4
    System error
