Docs say credHelpers are unsupported

[kshakir]

Which Document page:

On what page is the problem?

https://apptainer.org/docs/user/1.2/docker_and_oci.html#docker-cli-authentication

Expected results:

According to this github issue apptainer/singularity#2792 (comment) and my experience with apptainer version 1.2.2 credentials helpers DO work.

So the docs should mention that via something along the lines of:

Apptainer can read credentials from external Docker credential helpers defined under the credHelpers in ~/.docker/config.json.

Actual results:

The docs currently say:

Apptainer can only read credentials stored directly in ~/.docker/config.json. It cannot read credentials from external Docker credential helpers.

[kshakir]

Note: one may run into issues trying out docker credentials until apptainer/apptainer#1616 is fixed.

[DrDaveD]

I'm guessing that it is implemented through the go libraries that apptainer is including and nobody noticed the documentation discrepency until now. Please submit a pull request to fix it.