The authentication mechanism to be used when connecting to the mail server.
def get_auth_mechanism() -> int: ... def set_auth_mechanism(value: int) -> None: ...
auth_mechanism = property(get_auth_mechanism, set_auth_mechanism)
By default, auth_mechanism is amUserPassword (0), and default plaintext authentication is used to login to the server.
If auth_mechanism is set to amSASLXOAuth2 (7), an OAUTH authorization string is used to authenticate. The authorization property must be set to a valid authorization string.
At the time of this writing no other authentication mechanisms are supported by Google.