The authentication flow enables the mobile client to seamlessly pass credentials through ACS to the Okta IdP.
Complete the Authentication Flow before completing the IdP definition. The Authentication Flow is not required, and other configurations are possible, but it improves the sign-in experience for the user.
For example, if the ACS IdP configuration specifies:
Browser for the First Login Flow, the user cannot progress past the login screen.
First Broker Login, the user is prompted to enter their first name, last name, and email address. While this configuration works, it is a poor user experience.
Direct Grant generates a missing parameter error.
Registration flow requires that the user enter their user profile information before continuing.
The ACS adds users to the user table as they access the system. The Simple Login Flow automatically populates the user table with the user name when the user signs in. No passwords are examined or tracked. The user authentication occurs on the Okta system
