Comment 4 for bug 1770835

@Florian This is not quite clear to me. Which of the following scenarios are we talking about:

1. Access key pair is not supported upstream under Keystone v3.

2. Juju does not support access key pair with Keystone v3.

3. Your Keystone-v3-based cloud is not configured for access key pair.

This resource suggests that Keystone v3 authentication types are more wide-ranged than v2 types:

https://lists-new.canonical.com/mailman3/postorius/lists/product-docs.lists.canonical.com/members/subscriber/