Fix Google Cloud Email Issue

Job ID: 39389416

Budget: $15 – $25 USD

Our mobile app, available on Android and iOS and developed in Swift, integrates with Firebase and Google Cloud Functions to send stock alerts.

Currently, we face an issue with the email-sending functionality via Google Cloud Functions, generating the error:
```
535-5.7.8 Username and Password not accepted.
```

As the email account credentials have been recently changed, we need a developer to:
- Debug and resolve the authentication issue
- Ensure email alerts are sent to subscribers

Access to the Google Cloud Console and the app's backend will be provided.

Ideal skills and experience:
- Strong understanding of Google Cloud Functions
- Firebase Admin SDK and the Firebase Functions SDK
- Proficiency in debugging email-sending issues