You can do this by creating Application links between them and when you do that, please chose the option which says they both use same username and create the link.
You can also go into JIRA User server in JIRA and Confluence to it with the password and the IP address.
Look at Connecting Confluence to JIRA for User Management section in the above link
Hope this helps
It's officially Tuesday, which means it's officially time for another tip to help you better navigate this space we call the Atlassian Community. 😄 I got a great question from community member, Sa...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs