As per GitHub' announcement, December 2020, account passwords will no longer be supported to authenticate Git operations beginning on August 13, 2021. In other words, password authentication has been deprecated.
If you have a tool or are heavily dependent on git cli for everyday workflows, you will be impacted by this. Please do wait until the last minute to update your GitHub auth method; do it today and get acquainted with the new workflow.
The two Github authentication methods supported will be:
Please read more on the above to set it up.