Custom popup for server management

Hey, I want to suggest a feature. There are a ton of gaming servers on Discord. All these servers try to implement some kind of role assignment feature, mostly with the help of bots. But bot-messages aren't the most user friendly way to self assign roles. The second possibility is through a web interface, but the user has to sign into Discord inside the browser in order to use the web interface and has to leave the discord app.

I would like to suggest the possibility for developers to create custom popups inside the discord app for server management. The popup would look like the popup from one of the Among Us server (see photo) on Discord. The developer would create the content for the popup and Discord would display it for the logged in user. Therefore the developer would have access to the current user and the users would be much happier.