1. SQL backend allows to change user name (tested) 2. keystone CLI allows to change user name 3. I think we should not allow changing name to existing names by conflict check, but if the name is changed to a new name, I don't see a reason to not allow it.
Some reasons to allow change user name.
1. SQL backend allows to change user name (tested) 2. keystone CLI allows to change user name 3. I think we should not allow changing name to existing names by conflict check, but if the name is changed to a new name, I don't see a reason to not allow it.