Our bot have a feature that can change the bots prefix. When user change the bots user, We collect their username, id, guild name/id and the prefix.
We collect your data becasue we need to memorize your desired prefix for the bot.
When the user execute a command there's a desired prefix for the command and we use user data to find that data. We use username, user id and guild id
We use mongodb company to hold your data. It's a trusted company by millions of users.
We store our data in a databse so if user want to remove his/her data the user can join to our official discord server and make a ticker requesting to remove their data from the database. Server link - https://discord.gg/muUcvsV