backstage/.changeset/clever-timers-thank.md

@backstage/backend-common, @backstage/integration

@backstage/backend-common	@backstage/integration
patch	patch

Add support for GitHub Apps authentication for backend plugins.

GithubCredentialsProvider requests and caches GitHub credentials based on a repository or organization url.

The GithubCredentialsProvider class should be considered stateful since tokens will be cached internally. Consecutive calls to get credentials will return the same token, tokens older than 50 minutes will be considered expired and reissued. GithubCredentialsProvider will default to the configured access token if no GitHub Apps are configured.

More information on how to create and configure a GitHub App to use with backstage can be found in the documentation.

Usage:

const credentialsProvider = new GithubCredentialsProvider(config);
const { token, headers } = await credentialsProvider.getCredentials({
  url: 'https://github.com/',
});

Updates GithubUrlReader to use the GithubCredentialsProvider.