'Checks access to the given client.
Args:
token: User credentials token.
client_urn: URN of a client to check.
Returns:
True if access is allowed, raises otherwise.'

def CheckClientAccess(self, token, client_urn):

    logging.debug('Checking    %s    for    client    %s    access.', token, client_urn)
    raise NotImplementedError()
