Username in CLI

Hi to everybody!
Very stupid question i want to ask, but i can’t find any solution in manuals and faq’s
When i use asterisk -rx’sip show peers’ i see something like this
Name/username Host Dyn Forcerport ACL Port Status
3000/3000 D N A 5060 OK (10 ms)

So the trouble is field Name/Username. As i understand there should be smth like 3000/John Smith (or John Smith/3000). I can’t find where i can add this username.
Tried to add string username=John Smith in extensions_custom.conf and reload sip, but nothing changed.
i have FreePBX and all modules updated to .11 version.
I have a big list with the same fields.

Thnx for your any help!

Name is the sip context, you will see them all in /etc/asterisk/sip_additional.conf username is the user using it, for extensions generally the same unless using uers and devices, for trunks it would be the user if used.