如何编写登陆接口？

active = None#程序执行的标识符def verification(username):"""验证用户是否锁定"""locked_users = []    with open("locked_file") as locked_f:for line in locked_f:            locked_user,locked_pwd = line.split(":")            locked_users.append(locked_user)        print(locked_users)if username in locked_users:        print("对不起，你的用户名已经被锁定，请联系管理员！")else:        active = Truereturn activedef is_registered(username):"""验证用户是否注册，注册就让用户登录，未注册让用户选择重新输入或者注册"""users = {}    with open("active_file","r+") as f:for active_line in f:            user,pwd = active_line.split(":")            users[user] = pwdif username in users.keys():        test_num = 0while test_num < 3:            user_pwd = input("请输入您的密码：")if user_pwd == users[username]:                print("welcome back，have a good time!")return Falseelse:                test_num += 1else:            #用户输入三次以上锁定用户，使用的是while...else...方法            print("对不起，你输入的次数过多，你的用户已经被锁定，请联系管理员！")            mes = "" + username + ":" + users[username]            with open("locked_file","a") as f1:                f1.write(mes)return Falseelse:        print("您输入的用户名不存在，请按照下面的提示选择！")        print("注册：请输入1登录：请输入2")        num = input("请输入你的选择：")if num == "1":            register_name = input("请输入你要注册的用户名：")while True:                register_pwd = input("请输入你的密码：")                register_pwd2 = input("请再次输入你的密码：")if register_pwd == register_pwd2:breakelse:                    print("您输入的密码不对，请重新输入")            message = "" + register_name + ":" + register_pwd            print("Thank for your registing,have a good time!")            with open("active_file","a") as f_obj:                f_obj.write(message)return False        elif num == "2":            user_name = input("请重新输入你的用户名：")            verification(user_name)if __name__ == "__main__":    username = input("请输入你的用户名：")    active = verification(username)while active:        active = is_registered(username)