get data from database

app/Http/Controllers/Controller.php

 
     public function getDatabase(Request $request)
     {
-        $staffFirst = Staff::where('email', 'yakikaze93@gmail.com')->first();
-        $staff = Staff::where('api_token', $staffFirst->api_token )->get();
+        
+        $staff = Staff::where('api_token', '' )->where('roles_access','Installer')->get();
 
         return $staff;
     }