Avoid account creation when end user first login

I wish to use Okta as identity management only: openid connect +Oauth2.
I’m creating end users from my application, on okta using okta api and activate them.
When these users are access my web application, they are first redirect to okta for login - So far so good.

However, after their first successful login - they are asked to create an account.
How can I avoid that? (JIT provisioning flag is disable).
I would want okta to verify the login and redirect back to the redirect url in the request and the application.