Azeroth Survivors has a Discord, and the game's own page links to it. This page covers the server, how to tell it from the fan-run ones, and what to do when an invite dies. The link below is the invite this site has used since it started publishing.
If that button fails, the link on wow.aethus.pl is the one to trust. Invites expire; a fan page does not always notice.
What the server is for
Four things, in the order people actually use them. Finding someone to play with comes first, because co-op needs a second person and the game's lobby does not find one for you. Balance talk comes second, and it is loud: nine classes with different health pools and different ceilings produce a permanent argument about who is being carried.
Then bug reports. A fan project run by one person collects its bug list from the people playing it, and the Discord is where that list lives. A report that gets fixed usually says which class, which zone, and what the screen said. "It broke" gets read and forgotten.
Last is news. The host has a daily request limit, and when it is reached the game page replaces itself with a busy notice. The Discord is where you find out whether that is a five-minute queue or an evening of it, without opening the page every ten minutes to check.
Channel names change as a server grows, so this page does not list them. Look for the ones named for announcements, help and party-finding. The names move; what they are for does not.
How to tell it's the real one
Start with the game itself. The official page links its Discord, and the game's main menu carries a link too. Open one of those and compare the invite with the one you were given. If they differ, the game's link wins. That is the whole test, and it takes less time than reading this section.
Second check: read the announcement channel. Patch notes, downtime notices and new builds should be posted by the person making the game, not by someone relaying screenshots of someone else's post. A server where the announcements are all second-hand is a fan server, which is fine, as long as you know that is what you joined.
Third check, and the one that matters most: nobody should ask you for money. The game is free, has no accounts and no store. A server selling access, a "premium" role, a private build behind a payment, or a login that wants your game details is not the author's. There is nothing to buy here, so there is nothing to sell you.
Member count is not a check. A fan server can outnumber the real one, especially after a busy week, and a large server that appeared overnight is more likely to be riding the game's popularity than running it.
If the invite has expired
Discord invites expire. A link that worked in a video, a forum post or a screenshot of this page can be dead by the time you click it, and that is a normal thing rather than a sign that the server closed.
When it happens, go to the source. The official page at wow.aethus.pl links the server, and so does the game's main menu once it loads. Either link is fresher than anything a fan site can keep.
What not to do: take an invite from a direct message. A stranger offering a "backup server" for a game with no accounts has nothing to offer you, and the usual reason for that message is a scam or a repack.
Finding a co-op party
Co-op takes up to five players, each on their own hero. One person hosts, the lobby gets a code, and everyone else joins by that code or from the public list. A password is optional. The full mechanics, including the filters and the error messages, are on the azeroth survivors co-op page.
Two details cause most of the failed joins, and both are worth saying before you ask for a party. Zones unlock per class, so your hero has to have opened the host's zone or the lobby will refuse you. And both players have to be on the same game version, which usually means loading the page again rather than reinstalling anything.
A message that gets a fast answer is short and specific: the class you are bringing, the zone you want, and whether you have the zone unlocked. Three lines. Anyone who has hosted a lobby has read twenty messages that said only "anyone?" and moved on.
What this page is not
This site does not run the server, moderate it, or speak for it. It cannot recover an account that does not exist, reset progress that lives in your browser, or fix a bug in the client. Those conversations belong on the Discord, with the person who wrote the game.
FAQ
Is the Azeroth Survivors Discord official?
The game page and the game's main menu both carry a Discord link, and that one is the author's server. The invite on this page is meant to be the same server. If the two ever disagree, use the one the game itself shows.
Do I need Discord to play?
No. The game is free, runs in a browser tab, and has no account. Discord is for questions, balance arguments, bug reports and finding a party.
Can I report a bug there?
Yes, and a report that gets an answer says which class you played, which zone, and what the screen actually said. Screenshots help more than adjectives.
The invite does not work. What now?
Open the official page and use the Discord link there. Invites expire, and this page can lag behind the game by weeks.