save project

diy2.py

@@ -10,4 +10,6 @@ while True:
         print("密码错误，请重新输入！")
     if username != name and userpassword == password:
         print("用户不存在，请重新输入！")
+    if username != name and userpassword != password:
+        print("用户不存在，请重新输入！")
 print("欢迎来到贝尔编程!")
\ No newline at end of file