Garrys mod NPC help

Hello!
Im hosting a darprp server and what i would like to know is how do you make a npc on which you press e on and then it opens pointshop (the pointshop addon menu) (by default it opens with the !shop command or f3.

So what i would like to know is how do I make the npc interactable. So when you press e on him he will run a command for the player. This could be very useful for other stuff in the future too. This way i can let the npc run the !shop command for the player so it opens the menu for him.

Thank you for reading and i would really appreciate if you guys could help me!

-Mr Thom