[BUG] Claude doesn't recognized a pro user, redirects him to onboarding new user when trying to login

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

When I try to log in to Claude on any platform, Chrome or Mac app, it automatically redirects me to onboarding as a new user, even though I'm using the correct email address. I am logged in properly on an iPhone app so I can see the email address is correct and the account is active and is a paid pro user.
All attempts to clear cash, cookies, incognito, safari, everything brings the same result. And I can't report it properly to support because I cannot log in and my iPhone app doesn't let me contact support.
Your help bot couldn't help me and suggested that I open this issue on GitHub.

What Should Happen?

I should be redirected to my logged in page showing all my chats.

Error Messages/Logs

Steps to Reproduce

Just try to log in. Obviously this is not 100% reproducible and it probably has something to do with associating my email address with my account.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

any version

Platform

Other

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_