Why I wrote this here, rather than reporting with a ticket ?
I did. I reported this issue 2 times.
But both of them returned with the same reply.
Reply says that, revoke tokens if you don’t trust.
After that I checked the site. Its signin process was working as before.
So I didn’t get a convincing reply from support team, I write here to notice this issue.
Thank you.
Reply was like this:
Thank you for bringing this to our attention. We work to maintain a safe and healthy platform for our users and our team will look into this case and follow up as needed.
If you believe your account has been compromised, please review this help article. If suspicious and unauthorized activity is occurring on your account, please revoke access to all applications and re-authorize only those that are known and trusted.
If in the future you encounter other suspicious applications, please don't hesitate to contact us again.