Unable to add discovery profiles

Hello again.

I successfully (?) enrolled appliance with SCOM 2019 and imported all management pack.

Now I am going to discover the devices. So, as reported in the docs, I need to add profiles. I use SCOM Management Console, DELL EMC Open-Manage Integration Dashboard, and I am required to insert username and password. Windows domain user used to enroll doesn't work, neither admin. Using admin console there is no way to add users. What am I missing?

Thank you