GitHub Token Authentication Requirements for Git Operations
In July 2020, we announced our intent to require the use of token-based authentication (for example, a personal access, OAuth, or GitHub App installation token) for all authenticated Git operations. Beginning August 13, 2021, we will no longer accept account passwords when authenticating Git operations on GitHub.com.
Update (2021-08-13): GitHub (Hacker News):
As previously announced, starting on August 13, 2021, at 09:00 PST, we will no longer accept account passwords when authenticating Git operations on GitHub.com. Instead, token-based authentication (for example, personal access, OAuth, SSH Key, or GitHub App installation token) will be required for all authenticated Git operations.