Hello everyone,
Forgive me for posting this as I can guess someone may have already asked about something similar.
But, despite my many days of searching (with multiple keywords and tags) I find no answers, only more questions.
Which is cool, except that I really want my project to be done in a timely manner and I feel like I’m behind on my work.
So, as the title of this suggests, my needs are to do with doors, gates, pins, locking, and ownership of these.
I want to place some gates and doors on an arena map and possibly a few other structures that may need a pin.
But even more, I want to place some gates and doors where the admin of the map/arena will be the owner by default.
I’ve looked in the BPs for all doors, doorways, gates and gateways in ADK and have found only check-boxes to set whether a door/gate supports locking and pin-locking.
So far nothing seems to point towards a default pin-code (which I know is usually set in-game) or to have the structure that I placed in the map to be owned by server-admin as a default setting.
Essentially, I want an arena map that has gates lining the combat area that have default pins, or default ownership, so the simple press of a button/input to a keypad will open the doors we wish to have open.
This is so we can create the illusion of having some creatures enter the arena combat area through the doors like how the Roman Colosseum, and other similar arenas are set-up.
When I do place gates/doors, setting them to be indestructible is easy enough, the settings are there to have them only be damaged by certain things, or nothing. One can also set the health and many other things to them.
But I find no linking of these gates to a pin other than the checkboxes to allow pins and locking.
If anyone could tell me how to get to the settings for this I’d be eternally grateful. 
Thank you to all who have some input to this request.