This assumes you have already installed the Red Hat Single Sign On (SSO) Operator and that you have setup keycloak resource for Red Hat Single Sign On (SSO) and that you can sign into the Red Hat Single Sign On (SSO) console.
Create a Realm
In the left panel of the Red Hat Single Sign On (SSO) console, hover over the realm namespace (which by default is Master) and select Add realm.
Create a new realm.
Create a User
Select Users > Add user.
Create the users account.
Select the Credentials tab and give the user a password.