refactor: throw common error with util function instead

src/utils/error.ts

@@ -16,3 +16,11 @@ export function notFoundError(name: string) {
     `${name.charAt(0).toLowerCase() + name.replaceAll(" ", "").slice(1)}NotFound`,
   );
 }
+
+export function isUsedError(name: string) {
+  return new HttpError(
+    HttpStatus.PRECONDITION_FAILED,
+    `${name} cannot be found.`,
+    `${name.charAt(0).toLowerCase() + name.replaceAll(" ", "").slice(1)}IsUsed`,
+  );
+}