Use id instead of name for recruitment

[Metacinnabar]

Overview

As shown here, recruitment messages rely on usernames instead of user ids.

This breaks things such as when a user changes their name, or if their name has # in it.

[Metacinnabar]

From looking at the pre-existing code, the only fix I can think of is adding the user id to the embed author such as GoodPro712#1733 (550907912281915412), and then using that id to distinguish the author instead of using their username (which also has other issues such as if someone has a # in their username). Please let me know what you think the correct way to fix this is.

[Jofairden]

This should be using the UUID (discord snowflake id of the user)
It can simply be compared against the uuid of the author of the embed embed.Author.Id == user.Id