def authenticate(self, email=None, password=None):
if self.session.authenticate(email, password):<EOL><INDENT>return True<EOL><DEDENT>
Attempt to authenticate the user.

Parameters
----------
email : string
    The email of a user on Lending Club
password : string
    The user's password, for authentication.

Returns
-------
boolean
    True if the user authenticated or raises an exception if not

Raises
------
session.AuthenticationError
    If authentication failed
session.NetworkError
    If a network error occurred