Playernames and Prefixes

[RedTekk8]

Describe the bug
A clear and concise description of what the bug is:

Currently it looks like all playernames/nicknames in the server are some variation of '[Rank] [Nickname]' instead of just '[Nickname]'.
This breaks a LOT of the tab complete commands as the command /tp '[Rank] [Nickname]' actually just runs /tp '[Rank]'.
I believe this would be fairly easy to fix by just removing the [Rank] from everyone's nickname, and instead having it as a proper prefix.

To Reproduce
Steps to reproduce the failed tab complete: (remove unused steps please)

1. Connect to the server while at least 2 other people of the same rank are online ex: Ally and Ally
2. Type type '/tp ' in chat and use tab complete to enter one of the players name in.
3. Press Enter and see that the command failed.

Expected behavior
A clear and concise description of what you expected to happen.

When you use tab complete it should EITHER use the playername or the player nickname, but it should never include a player's prefix.

Username
Please include your Minecraft username, Discord username, Tag, and ID ([don't know how to get your id?]
Minecraft: RedTekk8
Discord: RedTekk8#4599 / 168420839446937600

[Notarin]

Not really sure exactly how this is actually done, its very difficult to determine what plugins are using exactly what values, but I'll see what I can do