    def __init__(self, duo_api, username):
        # type: (Any, str) -> None
        '''
        Args:
            duo_api (duo_client.Auth): An Auth API client from Duo.
            username (str): The username of the person authorized through
                            this object.
        '''
        self.client = duo_api
        self.username = username
        self.txid = None # type: str
        self.auth_time = datetime.min
        self.state = AUTH_STATES.NONE
Args:
duo_api (duo_client.Auth): An Auth API client from Duo.
username (str): The username of the person authorized through
this object.
securitybot/auth/duo.py