You can join the Discord by going into any Hypixel lobby and typing:
/discord
This command will give you a link to the Hypixel website to begin linking your Forums account to your Discord account. The link will ask you if you want to link your Discord.
Once agreeing to the start of the process, we will ask you to allow the Hypixel Discord Server to have access to your Discord username and avatar.
Now that you have authorized us to see your Discord username and avatar, it will ask you to confirm your Discord tag. Clicking "Yes, this is my Discord Tag" will automatically open your Discord client and ask you to join the official Hypixel Discord server.
And you're done, you have joined the Hypixel Discord server!
If you are having issues with linking your Minecraft account to the correct Discord account, try the following:
2. Click the gear in the bottom left to open the user settings.
3. Click "Log Out" on the bottom left.
4. Try linking again.
If you are still having issues, contact support.hypixel.net for further help.