在LoginStatus里添加了注册失败的枚举变量

src/backend/model/enums/LoginStatus.java

@@ -14,7 +14,8 @@ public enum LoginStatus {
     PERMISSION_DENIED(496,"权限不足"),
     LOGOUT_SUCCESS(497,"登出成功"),
     NOT_LOGGED_IN(498,"未登录"),
-    UNKNOWN_ERROR(499,"未知错误");
+    UNKNOWN_ERROR(499,"未知错误"),
+    REGISTER_FAILD(500,"注册失败");
 
     private final int code;
     private final String msg;