I need some guidance with respect to using the IdP module.

I plan to use the enterprise Okta to authenticate the users. I have 2 options:

1. Use the Idp forge component
2. Use the Okta APIs

My preference would be option 1 as it's SAML based. However, I'm not sure if this would always direct the users to enterprise login page. I also need to have a custom login page that the users should be redirected to if not logged-in. Does the IdP component allow redirecting the user to a custom login page and not the enterprise one?

Thanks in advance for any guidance.