(self, serviceName, username)
Called to build a user subscription message for a bot. Expects any
        return value that can later serve as a parameter to send_message.
Called to build a user subscription message for a bot. Expects any
        return value that can later serve as a parameter to send_message.
Called to build a user subscription message for a bot . Expects any return value that can later serve as a parameter to send_message .
def on_user_subscribe(self, serviceName, username):
        '''
        Called to build a user subscription message for a bot. Expects any
        return value that can later serve as a parameter to send_message.
        '''
        raise NotImplementedError
def on_user_subscribe ( self , serviceName , username ) : raise NotImplementedError