Implement user login register

import json
def login(acc_data):
    count = 0
    user = input("account:")
    passwd = input("password:")
    while count < 3:
        with open("database", "r") as db:
            d = json.loads(db.read())
            if user == d.get("username") and passwd == d.get("password"):
                print("login successfully")
                break
            else:
                print("Incorrect user name or password")
        count += 1


def regist(acc_data):
    user = input("usrname>>>")
    passwd = input("password>>>")
    temp = {

        "username" : user,
        "password" : passwd,
    }
    data = json.dumps(temp)
    with open("database","a") as db:

        db.write(data+"\n")



def start(acc_data):

    menu = """
        "1>>>登录",
        "2>>>注册",
        "3>>>退出"
    """

    menu_dict = {
        "1": login,
        "2": regist,

    }
    exit_flag = False
    while not exit_flag:
        print(menu)
        user_option = input(">>:").strip()
        if user_option in menu_dict:
            menu_dict[user_option](acc_data)
        elif user_option == "3":
            print("Welcome to again")
            break

start(1)