Issue Summary

Allow users with Atlassian accounts that are JSM customers and do not have a JSM portal-only customer account with the same email to navigate to https://<site>.atlassian.net/servicedesk/customer/portals and skip the email prompt and login directly using their Atlassian account session.

For users who have Atlassian accounts with JSM customer access and also have JSM portal-only customer account with the same email, do contineu to provide the email login prompt.

This mostly impacted all users with custom domain at the portal in JSM. Whenever users are routed to the callback URL they are challenged to enter their email address.

Steps to Reproduce

1. Give an Atlassian account the JSM customer permissions.
2. Have the user login to their Atlassian account (e.g. navigate to start.atlassian.com and successfully login).
3. Have the user navigate to https://<site>.atlassian.net/servicedesk/customer/portals

Expected Results

The user's active Atlassian account session successfully navigates them to the portal page.

Actual Results

The user is prompted to provide their email (Screenshot 2023-04-28 at 11.47.30 AM.png).

Workaround

Have users enter their email and follow prompts to login to their Atlassian accounts, Screenshot 2023-04-28 at 11.47.51 AM.png