I am using a private repository in my project ( for example https://github.com/org/repo), and recently I am getting the below error message when I trying to run composer install.
[Composer\Downloader\TransportException] The 'https://api.github.com/repos/org/myrepo' URL could not be accessed: HTTP/1.1 400 Bad Request You have to update your auth.json file. Please go to Settings > Developer settings > Personal access tokens (Direct URL: https://github.com/settings/tokens) page and generate a new token and copy the token string then enable sso and authorise with your private organisation. Update your auth.json like below format.
{ "http-basic": { "github.com": { "username": "<YOUR-USERNAME>", "password": "<NEW_TOKEN>" } } } 