The best way to do this would be to expose your "user database" to Jira as though it is another directory. Does this database have any way to present itself as an AD or LDAP directory? Could you set up a simple LDAP server based on it?
If that's not going to work, then you'll need to write an authenticator add-on for Jira and replace its internal one.
I’m a designer on the Jira team. For a long time, I’ve fielded questions from other designers about how they should be using Jira Software with their design team. I’ve also heard feedback from other ...
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