public function postStore(DeclaracionRequest $request, Guard $auth)
 {
     $declaracion = new Declaracion();
     $declaracion->fill($request->all());
     $declaracion->postulante = Postulante::where('user_id', $auth->id())->first()->id;
     $declaracion->save();
     return response()->json(['message' => "su declaración se ha guardado exitosamente."]);
 }