# coding=utf-8

class NoSuchSession(Exception):
    pass

class AuthenticationFailed(Exception):
    pass

class UserExists(Exception):
    pass

class SignupFailed(Exception):
    pass

class PasswordChangeFailed(Exception):
    pass

class RequestProcessingError(Exception):
    pass

class NotLoggedIn(Exception):
    pass

class AccountMergeRequired(Exception):

    def __init__(self, username):
        Exception.__init__(self)
        self.username = username  # the username which is required to be logged in, in order to merge the accounts