Step 1: Use the /is upgrades command to determine whether it is required to upgrade your maximum member count, if necessary upgrade the member count.

Step 2: After the previous step has been completed use the /is invite username.

Step 1: While in-game use /discord link, you will be given a 4-digit code

Step 2: Join the Sivils discord server and find the Sivils#6983 bot, then DM the code to the bot