Basic
CHGWBLSSN AUTHTYPE(*BASIC)
AuthType BasicEach authentication type entry must be within a session section. If more than one authentication type is specified in the same session section, the last entry will be used for that session.
When the server is processing requires, only one authentication type will be used. The one used will be the one that is nearest (and farthest from the root) to the session for which access is being evaluated.