def register(self, conn, user_name):
'''register new user, and login the user'''
if user_name in users:
self.__send_data_close(conn, usr_exist)
return False
user = User(username=user_name)
user.login(conn)
users[user_name] = user
conn_user_map[conn] = user
token_user_map[user.token] = user
self.__send_data(conn=conn, info=info_ok, kind=kind_register, token=user.token)
return True
