Here what I've received from GitHub's bot today:
On June 13th, 2020 at 14:57 (UTC) your application (AllMyChanges.com) used an access token (with the User-Agent python-requests/2.10.0) as part of a query parameter to access an endpoint through the GitHub API:
https://api.github.com/user
Please use the Authorization HTTP header instead as using the access_token query parameter is deprecated.
Depending on your API usage, we'll be sending you this email reminder on a monthly basis.
Visit https://developer.github.com/changes/2020-02-10-deprecating-auth-through-query-param for more information about suggested workarounds and removal dates.