Missing or invalid credentials.

Missing or invalid credentials.
...
fatal: Authentication failed for "..."

github profile setting => Developer settings => Personal access tokens.
토큰을 업데이트 해주면 해결됩니다.

git remote set-url origin https://<username>:<Personal_access_tokens>@github.com/<your github repository name>.git

출처 : https://stackoverflow.com/questions/62697845/git-push-origin-master-missing-or-invalid-credentials/68599166#68599166