# 'signup\_source' parameter in URL

**URL:** https://meta.discourse.org/t/signup-source-parameter-in-url/330586
**Category:** SSO
**Created:** [October 12, 2024, 4:02pm UTC](https://meta.discourse.org/t/signup-source-parameter-in-url/330586 "2024-10-12T16:02:54Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![merefield](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/merefield/32/176214_2.png) [@merefield](https://meta.discourse.org/u/merefield)
#### Post date: [October 12, 2024, 4:09pm UTC](https://meta.discourse.org/t/signup-source-parameter-in-url/330586/2 "2024-10-12T16:09:29Z")

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Use `external_id`?

> [@Finding a user by their identity provider 'external ID'](https://meta.discourse.org/t/finding-a-user-by-their-identity-provider-external-id/169723):
>
> bookmark This guide explains how to find a Discourse user based on their external\_id from an identity provider using API calls. person_raising_hand Required user level: Administrator When using an external authentication system, Discourse keeps track of two user ids: the Discourse user\_id, and an external\_id from the identity provider. If you need to lookup a Discourse user based on the external\_id, this #howto article is for you! Below, you’ll learn how to perform this operation. API S…

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