$data = [

app/Http/Resources/CourseMemberResource.php

@@ -15,7 +15,7 @@ class CourseMemberResource extends JsonResource
      */
     public function toArray($request)
     {
-        return [
+        $data = [
             "id"=>$this->id,
             "user_id"=> $this->user_id,
             "course_id"=> $this->course_id,
@@ -25,5 +25,6 @@ class CourseMemberResource extends JsonResource
             "created_at"=> $this->created_at,
             "updated_at"=> $this->updated_at,
         ];
+        return $data;
     }
 }