Only your token is saved on your computer with a cookie
This method is dangerous, bad things can happen if you put your token on a bad website, please check this website code with F12
-connect with a user token: Go 'https://discordapp.com/' -> F12 -> Application -> 🔽 Local Storage -> Https://discordapp.com -> token
-connect with a bot token: 'https://github.com/jagrosh/MusicBot/wiki/Getting-a-Bot-Token'