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app/Http/Controllers/admin/Backflow.php

@@ -18,6 +18,7 @@ class Backflow extends Controller
                 'limit' => ['required', 'integer', 'min:1'],
                 'member_id' => ['nullable', 'string'],
                 'date' => ['nullable', 'date_format:Y-m'],
+                'username' => ['nullable', 'string'],
             ]);
             $params['page'] = request()->input('page', 1);
             $params['limit'] = request()->input('limit', 10);