I can see, in the Profile Editor for the Okta User Profile, I can change the Format restrictions to none, but I am not sure how to apply this to my application profile as when I try and add a user it is still requiring me to use email for username?
It was my error. I was adding a user with an email that already existed.
Now I want to know if there are multiple applications being used on an Okta account, does this Okta profile apply to all, or can I set the allow other usernames for login only for my application?