set_user 3.0 allowlist does not works, have ot use old whitelist parameter

It's set_user 3.0, we want to leverage set_user to escalate to superuser for individual DBAs IDs. , frollow the readme , shoulde use set_user.superuser_allowlist, but per my test, set_user.superuser_whitelist doest not work, still need to use old version's parameter
set_user.superuser_whitelist.

set_user.superuser_whitelist = '+dbadmin'
#set_user.superuser_allowlist = '+dbadmin'
set_user.block_log_statement=on
set_user.nosuperuser_target_whitelist = ''
#set_user.nosuperuser_target_allowlist = ''

Regards,

James