# Link Perspective login to existing database

**URL:** <https://forum.inductiveautomation.com/t/link-perspective-login-to-existing-database/113571>\
**Category:** Ignition\
**Tags:** perspective\
**Created:** [January 27, 2026, 7:07pm UTC](https://forum.inductiveautomation.com/t/link-perspective-login-to-existing-database/113571 "2026-01-27T19:07:09Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![bill.gauvey](https://avatars.discourse-cdn.com/v4/letter/b/13edae/32.png) [@bill.gauvey](https://forum.inductiveautomation.com/u/bill.gauvey)\
**Post date:** [January 27, 2026, 7:07pm UTC](https://forum.inductiveautomation.com/t/link-perspective-login-to-existing-database/113571/1 "2026-01-27T19:07:09Z")

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I have an existing database application where there us a user table, roles table, and user roles table. The application has a REST API so I cant execute table queries. I can modify tables and create new tables but I have to expose those in the REST API. All calls to the API to get data requires a JWT to be applied to each call.  
I want to be able to link the login to the user table in the old application to the Ignition user. I can create a new in-house OIDC provider if I must, but I thought this would be a better place to start. Can I link the Ignition user to the existing user? So as long as the user exists in both sides, and the JWT can be used on the API I would think that I would be able to map the two. Of course there is the user/role management that I would have to fight with.

Are there any examples of an implementation of a custom identity provider in Ignition?