Credentials file authentication failing

[fhildt-lg]

Description of the bug:

When trying to use the option option.WithCredentialsFile to authenticate my client, it fails because of this function:

This is because internally, it calls withCredFile

So the type should be "option.withCredFile"

Actual vs expected behavior:

No response

Any other information you'd like to share?

No response

[Sivasankaran-1997]

@franco-hildt #232 This issue has been resolved and will be included in the upcoming release

cc @eliben