there is one admin user by default in your mendix app (MxAdmin), the password can be set in your app environment. (you have a button change admin password)
Thank you for your response. What if I want to add multiple usernames to the application on the cloud (instead of just MxAdmin)? Locally it works by using ‘demo users’, but I am unsure on how to add these users to the cloud. What is the process of adding other users in my Mendix app (besides MxAmin)?
If you meant Mendix Single Sign-On you need to implement it :
If you meant to have simple “local” users in your app, you probably have in your project an administration module, if it’s the case you just have to add in the navigation of your project an item that open the page Account_Overview. (This will enable the creation of users when you log as an admin)