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app/Models/Backflow.php

@@ -12,6 +12,6 @@ class Backflow extends BaseModel
     function member(): BelongsTo
     {
         return $this->belongsTo(User::class, 'member_id', 'member_id')
-            ->select(['member_id','username','first_name']);
+            ->select(['member_id', 'username', 'first_name']);
     }
 }

app/Services/BackflowService.php

@@ -84,8 +84,8 @@ class BackflowService extends BaseService
 
         if (isset($search['username']) && !empty($search['username'])) {
             $username = $search['username'];
-            $query = $query->whereHas('member', function ($query) use ($username) {
-                $query->where('username', $username);
+             $query->whereHas('member', function ($query1) use ($username) {
+                $query1->where('username', $username);
             });
         }
         $paginator = $query->paginate($limit);