code: def user_login(self, email=None, password=None):
          
          self._rpc_api = PiazzaRPC()
          self._rpc_api.user_login(email=email, password=password)
docs: Login with email, password and get back a session cookie
  
          :type  email: str
          :param email: The email used for authentication
          :type  password: str
          :param password: The password used for authentication