When describe json response, 'null' is better than 'nil' which is not in json specification. Signed-off-by: Yi EungJun <eungjun.yi@navercorp.com>
Following the discussion in #21556, adding a short description of the default user authentication mechanism (without requiring authentication plugins) Signed-off-by: Liron Levin <liron@twistlock.com>
Signed-off-by: Antonio Murdaca <runcom@redhat.com>