chore: clarify CAPTCHA logic

packages/amplify-category-auth/provider-utils/awscloudformation/triggers/VerifyAuthChallengeResponse/captcha-verify.js

@@ -7,11 +7,16 @@ exports.handler = async (event, context, callback) => {
     `https://www.google.com/recaptcha/api/siteverify?secret=${process.env.RECAPTCHASECRET}&response=${event.request.challengeAnswer}`,
     {},
   );
-
-  if (!(response && response.data && response.data.success)) {
+  /**
+   * If the CAPTCHA challenge succeeded, set the `answerCorrect` field to
+   * `true`; otherwise, set it to `false` and throw an error.
+   */
+  const challengeSucceeded = response && response.data && response.data.success;
+  if (challengeSucceeded) {
+    event.response.answerCorrect = true;
+  } else {
     event.response.answerCorrect = false;
-    throw new Error('captcha verification error');
+    throw new Error('CAPTCHA verification error');
   }
-
   return event;
 };