[SR-Users] Disable non-existent user warning

[Stefan Rüetschli]

Hello sr-users!

I'm using Kamailio 5.1.2.
If I execute the command "serctl acl grant 1234 mygrant" I get a warning 
which I have to accept with "Y":
Non-existent user '1234'. Still proceeding? [Y|N]

Is it possible to deactivate this warning? I know why this warning is 
there (it's not a user, it's an alias), so I think I know what I'm doing ;-)

Regards
Stefan