Make sure you have the
Manage Server permission in the server you want to invite Fire to.
Head to inv.wtf/bot in your browser. If you aren't signed into Discord on the web, you will be asked to do so. Once signed in, you will be greeted with the page below. Select a server, click Continue, review permissions then click Authorize and complete the Captcha. Voila! Fire is now in your server, ready to rock and roll.