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---
title: "GitLab SSO"
description: "Learn how to configure GitLab SSO for Hanzo KMS."
---
Using GitLab SSO on a self-hosted instance of Hanzo KMS requires configuring an OAuth application in GitLab and registering your instance with it.
<Steps>
<Step title="Create an OAuth application in GitLab">
Navigate to your user Settings > Applications to create a new GitLab application.
![sso gitlab config](/images/sso/gitlab/edit-profile.png)
![sso gitlab config](/images/sso/gitlab/new-app.png)
Create the application. As part of the form, set the **Redirect URI** to `https://your-domain.com/api/v1/sso/gitlab`.
Note that only `read_user` is required as part of the **Scopes** configuration.
![sso gitlab config](/images/sso/gitlab/new-app-form.png)
<Note>
If you have a GitLab group, you can create an OAuth application under it
in your group Settings > Applications.
</Note>
</Step>
<Step title="Add your OAuth application credentials to Hanzo KMS">
Obtain the **Application ID** and **Secret** for your GitLab application.
![sso gitlab config](/images/sso/gitlab/credentials.png)
Back in your Hanzo KMS instance, make sure to set the following environment variables:
- `CLIENT_ID_GITLAB_LOGIN`: The **Client ID** of your GitLab application.
- `CLIENT_SECRET_GITLAB_LOGIN`: The **Secret** of your GitLab application.
- (optional) `URL_GITLAB_LOGIN`: The URL of your self-hosted instance of GitLab where the OAuth application is registered. If no URL is passed in, this will default to `https://gitlab.com`.
- `AUTH_SECRET`: A secret key used for signing and verifying JWT. This can be a random 32-byte base64 string generated with `openssl rand -base64 32`.
- `SITE_URL`: The URL of your self-hosted instance of Hanzo KMS - should be an absolute URL including the protocol (e.g. https://kms.hanzo.ai)
Once added, restart your Hanzo KMS instance and log in with GitLab.
</Step>
</Steps>
## FAQ
<AccordionGroup>
<Accordion title="Why is GitLab SSO not working?">
It is likely that you have misconfigured your self-hosted instance of Hanzo KMS. You should:
- Check that you have set the `CLIENT_ID_GITLAB_LOGIN`, `CLIENT_SECRET_GITLAB_LOGIN`,
`AUTH_SECRET`, and `SITE_URL` environment variables.
- Check that the **Redirect URI** specified in GitLab matches the `SITE_URL` environment variable.
For example, if the former is `https://kms.hanzo.ai/api/v1/sso/gitlab` then the latter should be `https://kms.hanzo.ai`.
</Accordion>
</AccordionGroup>