保存管理员更改时, 如果帐号是管理员则忽略username的修改

src/admin/controllers/account.controller.ts

@@ -51,10 +51,7 @@ class AccountController extends BaseController {
       account = new Admin()
       account.level = 9
     }
-    if (username) {
-      if (ADMINS.indexOf(username) >= 0) {
-        throw new ZError(20, 'can not change admin username')
-      }
+    if (username && ADMINS.indexOf(username) == -1) {
       account.username = username
     }
     let admin = req.user