用户密码必须有英文字母，用户名选填4

app/Services/AdminUsersService.php

@@ -111,7 +111,7 @@ final class AdminUsersService
             $oldValue = $model->toArray();
             $update = [
                 'username'   => $data['username'],
-                'name'       => $data['name'],
+                'name'       => $data['name'] ?? '',
                 'avatar'     => '',
                 'email'      => $data['email'] ?? '',
                 'position'   => $data['position'] ?? '',