You should Set the invite link to never expire
You should add this bot to your server before you order [https://discord.com/oauth2/authorize?client_id=1217129769053982821&permissions=1&integration_type=0&scope=bot](https://discord.com/oauth2/authorize?client_id=1217129769053982821&permissions=1&integration_type=0&scope=bot) The bot has only permission to create invites. After you have received the members, you may remove the bot or it will be left automatically.
