restic/changelog/unreleased/pull-1552

Feature: Use Google Application Default credentials

Google provide libraries to generate appropriate credentials with various
fallback sources. This change uses the library to generate our GCS client, which
allows us to make use of these extra methods.

This should be backward compatible with previous restic behaviour while adding
the additional capabilities to auth from Google's internal metadata endpoints.
For users running restic in GCP this can make authentication far easier than it
was before.

https://developers.google.com/identity/protocols/application-default-credentials
Update docs and add changelog entry: Google auth Add documentation around using default Google application credentials, along with a changelog extra that describes the feature and the potential impact on existing restic uses (read: none). 2018-01-12 17:36:57 +00:00			`Feature: Use Google Application Default credentials`

			`Google provide libraries to generate appropriate credentials with various`
			`fallback sources. This change uses the library to generate our GCS client, which`
			`allows us to make use of these extra methods.`

			`This should be backward compatible with previous restic behaviour while adding`
			`the additional capabilities to auth from Google's internal metadata endpoints.`
			`For users running restic in GCP this can make authentication far easier than it`
			`was before.`

			`https://developers.google.com/identity/protocols/application-default-credentials`