> For the complete documentation index, see [llms.txt](https://docs.tryterra.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tryterra.co/faq/help-topics/no-data/auth-scopes-user-id-matching.md).

# Auth, scopes & user ID matching

Common questions about auth, scopes & user ID matching.

## Articles

{% content-ref url="/pages/yVzGysQt1MCsa9M8Q7Pr" %}
[Why does user\_id not match between UI and webhooks?](/faq/help-topics/no-data/auth-scopes-user-id-matching/same-account-multiple-reference-ids-duplicates.md)
{% endcontent-ref %}

{% content-ref url="/pages/XyOLUNeFsBPJbuS0fNZx" %}
[Why does my redirect fail with missing\_scopes?](/faq/help-topics/no-data/auth-scopes-user-id-matching/missing-or-insufficient-scopes-on-auth.md)
{% endcontent-ref %}

{% content-ref url="/pages/uWGZCm8i2j6hAwnjlRGx" %}
[How do I handle a changed Terra user ID after reauth?](/faq/help-topics/no-data/auth-scopes-user-id-matching/reauth-webhook-user-id-changes.md)
{% endcontent-ref %}