Hi Hasti ,
Well, in the commit you shared at "https://github.com/Hasti-Jalali/Cloud-Computing/blob/main/Homeworks/1/email.py", it seems that you overlooked and hardcoded the API_KEY and DOMAIN for connecting to Mailgun. I checked, and this token is still not expired, so it is possible to use it.

I advise you to expire the Mailgun token and never hardcode your token in the project. Instead, use .ENV or environment variables for storing sensitive information like API keys.

Good luck 😊