Support OAuth Token for authenticating on GCS Backend same way the terraform-google-provider does

[primeroz]

Current Terraform Version

0.11.13

Use-cases

We use Vault to generate dynamic GCP Secrets to then run terraform.

We would like to use the OAuth token rather than the json private key for all the good reasons stated here but currently we can't because while the terraform google provider support using the token , see here and the option to expose it as an environment variable, the backend does not.

I did raise a case to the terraform provider first without understanding that the backend is actually part of core

Attempted Solutions

None really since the backend only work with credentials.json

Proposal

References

• Allow to use GOOGLE_OAUTH_ACCESS_TOKEN in backend configuration the same way that is used in the provider configuration terraform-provider-google#3821

[emilymye]

@paddycarver moved from hashicorp/terraform-provider-google#3821

[luis-silva]

@emilymye I took the liberty of adding this PR as I have a similar use case and quite need the functionality. Can you review it?

[luis-silva]

@paddycarver @emilymye @mildwonkey Anyone happy to do a quick review of the PR associated with this issue? It's pretty straight forward.

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.