Credential
Description:
[ CCode ( has_construct_function = false ) ]
public Credential (string username, string password, CredentialPersistence persistence)
  public Credential (string username, string password, CredentialPersistence persistence)
Create a new credential from the provided username, password and persistence mode.
Parameters:
| username | The username for the new credential | 
| password | The password for the new credential | 
| persistence | The CredentialPersistence of the new credential | 
Returns:
| A Credential. |