Twitter new device detected.

I'm running Monterey, Safari 15.6.1

I use Safari, Google...I have also tried it with Firefox.

Pulling my hair out on this one.

I know this isn't technically a Twitter forum, but thought I would ask just in case it's something my end.

Up until last November or so, each time I log into my Twitter account from my Mac, I get a notification that I am logging in from a new device.

I also get an Email alert.

I don't own a phone, or iPad...or anything else that I could be logged into my account.

I have gone through everything on my account, but I just can't stop it.

I have cleared as much as I can on my mac, and changed my password.

The location shown, is my provider.

I don't have an add blocker or anything that might stop it somehow. I have also uninstalled my VPN, even though I have never used it for browsing. And I have had it for 3 years.

I have tried 'end all sessions' in twitter, and I have had a look in google to see if I am logged in anywhere else, just in case for some stupid reason it thinks I am.

I have tried starting in safe mode on my mac. There are no other accounts on my mac either.

Help.

EDIT: I have also tried Malwarebytes as a last resort. It came up clear.