AIX: How to check which authentication method we are using for a user?

In /etc/security/user, we can set which authentication method we use for each user. for example:

test:
admin = false
rlogin = false
SYSTEM = "NONE"

I want to test whether SYSTEM=NONE (without ") is acceptable. How can I verify it? and How can we check which authentication mehtod we are using?

Thanks in advance.

I don't quiet understand the exact motive behind this..

"NONE" is an invalid parameter for SYSTEM, hence it will fall back to the default SYSTEM defined in the same file.