我不擅长编程，所以这就是为什么我在这里寻求帮助。我正在为我的酒店预订系统创建一个登录系统，但我遇到了一些问题。这是我通过帮助别人的代码为登录系统所做的。链接:Python Login and Register System using text files

def get_existing_users():
with open("login.txt", "r" ) as f:
     for line in f.readlines():
         # This expects each line of a file to be (name, pass) seperated by whitespace
         username, password = line.split(',')
         yield username, password
         
def is_authorized(username, password):
return any((user == (username, password) for user in get_existing_users()))
def user_exists(username):
return any((usr_name == username) for usr_name, _ in get_existing_users())
# above is equivalent of:
#
# for usr_name, _ in get_existing_users():
#     if usr_name == username:
#        return True
# return False
def ask_user_credentials():
count = 0
while count < 3:
    username = input("Enter Username: ")
    password = input("Enter a Password: ")
    if is_authorized(username, password):
        print ("Welcome to the Majestic Hotel Booking system ") + username
        MainMenu()
    if user_exists(username):
        print("The password entered is wrong, please try again")
    print("The username entered is wrong, please try again")
count = count + 1 
def getdetails():
forename = input("Enter forename: ")
surname = input("Enter Surname: ")
year = input("Enter year you are born: ")
if year <= '2004':
    print("You are old enough to register yourself")
    username = forename[0]+surname[0:3]+year[3:4]
    print("Username: ", username)
    
    password = input("Enter a password: ")
    file = open("login.txt","a")
    file.write(username + "," + password + "\n")
    file.close()
    MainMenu()
else:
    print("Sorry you are not old enough to register by yourself")    enter code here
if account == "No":
print(getdetails())
if account == "Yes":
print(ask_user_credentials())

创建或登录帐户后，程序会将它们定向到主菜单，这就是为什么您会在代码中看到 MainMenu（）。

我创建了一个帐户，如下所示：

WELCOME TO THE MAJESTIC HOTEL lOGIN SYSTEM
************************************************
Do you have an account? Yes or No: No
Enter forename: Rose
Enter Surname: Moon
Enter year you are born: 2000
You are old enough to register yourself
Username:  RMoo0
Enter a password: door

然后将其保存在名为 login.txt 的文本文件中，如下所示：

RMoo0,door

然而，虽然我创建了一个帐户，它被保存到文本文件，但输出是这样说的：

WELCOME TO THE MAJESTIC HOTEL lOGIN SYSTEM
************************************************
Do you have an account? Yes or No: Yes
Enter Username: RMoo0
Enter a Password: door
The password entered is wrong, please try again
The username entered is wrong, please try again
Enter Username: 

有人可以帮助我，并以一种我会理解的方式解释解决方案。