YAML write and read help

[infered5]

Skript 2.2-Fixes-V9b
SkQuery 3.21.4
SkUtilities 0.8.8
skRayFall 1.9.2
Minecraft 1.8.8 with ViaVersion up to 1.11.2

I'm trying to make a system where players can only change their nicknames a few times, with the ability to add the amount of times they can change it. I'd like to make a YAML file, with a command that adds the player's UUID and the amount of nicks they have left.

What I'd like is something like:

players:
  uuid:
  - 1
  uuid:
  - 3
  uuid:
  - 5

and so on and so forth. I can easily read YAMLs but I cannot figure out how to generate and write to them. So far I have

set {_guns::common::*} to yml list "guns.common" of file "plugins/Skript/Cryptarch/droptable.yml"

from my other large Skript that reads from a droptable, so I can salvage that code easily enough. I have no idea how I'm going to write to them, nothing works right.

command /addnick <player>:
    permission: destiny.nickname.add
    trigger:
        set {_uuid} to player's UUID
        set {_1} to 1
        message "%{_uuid}%"
        if yaml value "player.%arg 1%" of file "/plugins/Destiny/test.yml" exists:
            send "Player already exists! Adding use!" to the console
            add "%{_1}%" to yaml list "player.%arg 1%.use" of file "/plugins/Destiny/test.yml"
        set {_uses::*} to yaml list "player.%arg 1%.use" of file "/plugins/Destiny/test.yml"
        message "%{_uses::*}%"

Edit: Now I have the ability to write to a YAML, but the YAML generated is as follows:

player:
  infered5:
    use:
    - '1'
    - '1'
    - '1'

Is there a way to change this so it's like this:

player:
  infered5:
    use:
    - '3'