    def greet_user(self, user):
        # type: (User) -> None
        '''
        Sends a greeting message to a user.

        Args:
            user (User): The user to greet.
        '''
        self.chat.message_user(user, self.messages['greeting'].format(user.get_name()))
Sends a greeting message to a user.

Args:
user (User): The user to greet.
securitybot/bot.py