External Auth provider users like SAML should be able to get Identity token using REST API

What problem are you trying to solve? Why? .
External users like SAML users should be able to get their own Identity token using REST API.
Feature description: External user should be redirected to SAML provider directly when we run the REST API for authentication to Artifactory and then get the Identity token. This is to avoid the user to login to UI and get their own Identity token.
What is the expected behavior? External users like SAML users need to login to UI to get their Identity token and use it for authentication in running REST API calls.