print("Sign up")
# user will enter custom usermame and pass

username = input("Username: ")
password = input("Password: ")

while True:
    print("log in")
    username1 = input("username: ")
    password1 = input("password: ")

    if username1 == username and password1 == password:
        print("Successfully logged in")
    elif username1 == username and password1 != password:
        print("Username correct but password is incorrect")
    elif password1 == password and username1 != username:
        print("Password correct but username is incorrect")
    elif username1 != username and password1 != password:
        print("username and password incorrect")