Sort the users in a dropdown

Hi there,

I am having an assignment system task in a table that needs to assign each one for a certain user that is already using the app.

So suppose I have 20 users on the app and I need to have them all listed in dropdown automatically so I can assign the task to them and also they get populated based on the emails on this area

So would ease up the way for us and also disable any one who got removed from the app