---
title: "Link Auth0 User"
method: POST
path: "/api/platform/users/{user_id}/link"
tags: ["platform"]
---

# Link Auth0 User

`POST /api/platform/users/{user_id}/link`

Join another Auth0 login to this person via FGA ``user.linked`` tuples.

Requires ``editor`` on the ``members-users`` module instance (POST maps to editor).
Also discovers every Auth0 user sharing either person's email so the linked
group matches automatic reconciliation.

## Path parameters

- `user_id` string, required — Auth0 user id to link from

## Request body

- LinkAuth0UserRequest — Operator payload for joining another Auth0 login to this person.
  - `linkedUserId` string, required

## Response `200`

Successful Response

- UserLinkedSubsResponse — FGA ``user.linked`` subs for one person after an operator link action.
  - `userId` string, required
  - `linkedSubs` string[]

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.dev/gocrisp/apis/crisp-app-dock.md) · [All operations](https://skmtc.dev/gocrisp/apis/crisp-app-dock/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/gocrisp/crisp-app-dock/revisions/e56bd3c1a9db/schema)