Contributions count differs depending on whether the access token belongs to the account being viewed — private contributions not reflected?

**Description**

Not sure if this is expected behavior, a personal issue or a bug, but I'm seeing different contribution counts depending on which token I use.

On the public demo linked in the README, my contributions are shown correctly.

When I deploy the same app to Vercel and use my own personal token, with or without permissions, private commits are not counted (I do have private contributions turned on).

Now if I use a token from a different GitHub account, without _any_ scopes, the count looks accurate again.

Has anyone seen this before? Is this a known issue or a GitHub API quirk? Would appreciate it if someone could confirm this.

Love this project, the amount of configuration is great!

Thank you very much.