auto save

diy2.py

@@ -6,9 +6,7 @@ while True:
     if name == username and password == userpassword:
         print("登录成功!")
         break
-    if name != username:
-        print("该用户名不存在")
-        continue
+    if name != u
     if password != userpassword:
         print("密码错误")
     print("用户名和密码错误!请重新输入")