Hey there! Let's sort out how to correctly fetch user details via Auth0's /api/v2/users/{id} endpoint since your attempt with the sub field didn't work. Here are the key points to resolve this:

1. Double-check how you're using the sub field #

First off, the sub value is actually a valid user identifier for the Management API—you just need to pass the full, unmodified value. Auth0's sub follows the format {identity_provider}|{unique_user_id} (e.g., auth0|abc123xyz or google-oauth2|987654). If you only passed the part after the |, that's why your request failed. Try sending the entire sub string as the {id} parameter, like this:

GET /api/v2/users/auth0|abc123xyz

2. Alternative ways to get a valid user ID #

If you can't use sub for some reason, here are other methods to retrieve the correct user ID:

• Search by email: Use the /api/v2/users-by-email endpoint, passing the user's verified email as a query parameter. This will return the full user object, including the user_id field you can use in the /api/v2/users/{id} request:

  GET /api/v2/users-by-email?email=user@example.com
  

• Filter users by other attributes: Use the /api/v2/users endpoint with a query filter to search by fields like nickname, given_name, or family_name. For example:

  GET /api/v2/users?q=nickname:"johndoe"&search_engine=v3
  

  The response will include matching users, each with their user_id property.

3. Verify your API permissions #

Don't forget: even if you have the right user ID, your request will fail if the Access Token used to call the Management API doesn't have the required permissions. Make sure your token includes the read:users scope (you can configure this in your Auth0 Dashboard under the Management API's permissions settings).

内容的提问来源于stack exchange，提问作者Taylor Austin