If manila operations fail, e.g. create share or create share group, user gets no detailed information whatsoever. Only the operation status is updated, e.g. error or failed, without any update to user. We should address this by adding a /messages resource to the API in order for end-users to query for more information about errors.
Upstream doc: https://specs.openstack.org/openstack/manila-specs/specs/pike/user-messages.html
Please find content at this location: https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/14/html-single/storage_guide/#configuring-user-messages-support