[QwertyAccess]

this way you dont need to define the amount of admins,
you might want to make it say steam only instead of 1.6 suggest you borrow/modify some code from the current admin_mysql

register_cvar("amx_mode","2.0")
register_cvar("amx_password_field","_pw")
register_cvar("amx_default_access","")

features like that need to be added.