add quick answers

backend/src/services/QuickAnswerService/ShowQuickAnswerService.ts

@@ -0,0 +1,14 @@
+import QuickAnswer from "../../models/QuickAnswer";
+import AppError from "../../errors/AppError";
+
+const ShowQuickAnswerService = async (id: string): Promise<QuickAnswer> => {
+  const quickAnswer = await QuickAnswer.findByPk(id);
+
+  if (!quickAnswer) {
+    throw new AppError("ERR_NO_QUICK_ANSWERS_FOUND", 404);
+  }
+
+  return quickAnswer;
+};
+
+export default ShowQuickAnswerService;