Configuring APIC into ACI I've run the setup for the first APIC into the Fabric and that worked.

i set the cluster size to 3 for 3 servers and selected controlled id 1 for the first one.

I do the same config (except for controller 2) but it didn't ask me for the admin password to change it, after the ip info it went straight to the login prompt and i can't log in with the admin user i made.