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Add Twitch as a social sign-in provider in Ory

Configuration for Ory Cloud​

Follow these steps to add Twitch as a social sign-in provider to your Ory Cloud project using the Ory CLI:

  1. Create a Twitch OAuth2 Application.

  2. In the created app, set the redirect URI to:

    https://<ory-cloud-project-slug>.projects.oryapis.com/self-service/methods/oidc/callback/twitch

  1. Create a Jsonnet code snippet to map the desired claims to the Ory Identity schema.

    local claims = {
      email_verified: false,
    } + std.extVar('claims');

    {
      identity: {
        traits: {
          // Allowing unverified email addresses enables account
          // enumeration attacks, if the value is used for
          // verification or as a password login identifier.
          //
          // Therefore we only return the email if it (a) exists and (b) is marked verified
          // by Twitch.
          [if 'email' in claims && claims.email_verified then 'email' else null]: claims.email,
        },
      },
    }
    info

    Twitch provides an OIDC discovery URL, but it doesn't support the openid claim and returns an access_token only. Ory sends requests to Twitch's /me API and adds the user info to std.extVar('claims').

danger

Don't save secrets such as API keys, credentials, or personal data directly in Jsonnet code snippets. Jsonnet code snippets used for data mapping aren't stored in an encrypted format in Ory Cloud.

  1. Encode the Jsonnet snippet with Base64 or host it under an URL accessible to Ory Cloud.

  2. Download the Identity Service config from your Ory Cloud project and save it to a file:

    ## List all available projects
    ory list projects

    ## Get config
    ory get identity-config <project-id> --format yaml > identity-config.yaml

  1. Add the social sign-in provider configuration to the downloaded config. Add the Jsonnet snippet with mappings as a Base64 string or provide an URL to the file.

    selfservice:
      methods:
        oidc:
          config:
            providers:
              - id: twitch # this is `<provider-id>` in the Authorization callback URL. DO NOT CHANGE IT ONCE SET!
                provider: generic
                client_id: .... # Replace this with the OAuth2 Client ID provided by Twitch
                client_secret: .... # Replace this with the OAuth2 Client Secret provided by Twitch
                issuer_url: https://id.twitch.tv/oauth2
                mapper_url: "base64://<YOUR_BASE64_ENCODED_JSONNET_HERE>"
                # Alternatively, use an URL:
                # mapper_url: https://storage.googleapis.com/abc-cde-prd/9cac9717f007808bf17f22ce7f4295c739604b183f05ac4afb4
                scope:
                  - openid
                  - user:read:email # required for email and email_verified claims in the near future
                requested_claims: # explicitly request email and email_verified claims because twitch doesn't add them by default
                  id_token:
                    email:
                      essential: true
                    email_verified:
                      essential: true
          enabled: true

  2. Update the Ory Identity Service (Ory Kratos) configuration using the file you worked with:

    ory update identity-config <project-id> --file updated_config.yaml

Configuration for self-hosted instances​

Follow these steps to add Twitch as a social sign-in provider when self-hosting Ory Kratos:

  1. Create a Twitch OAuth2 Application.

  2. Set the redirect URI to URL that follows this pattern:

    http(s)://<domain-of-ory-kratos>:<public-port>/self-service/methods/oidc/callback/twitch

  3. Create a Jsonnet code snippet to map the desired claims to the Ory Identity schema.

  4. Encode the Jsonnet snippet with Base64 or store it in a location available to your Ory Kratos instance.

  5. Add the social sign-in provider configuration to the Ory Kratos configuration. Add the Jsonnet snippet with mappings as a Base64 string or provide a path or an URL of the file.

tip

When running a self-hosted instance, you can pass the social sign-in provider configuration in the SELFSERVICE_METHODS_OIDC_CONFIG_PROVIDERS environment variable. For example:

SELFSERVICE_METHODS_OIDC_CONFIG_PROVIDERS='[{"id":"google","provider":"google","mapper_url":"<file_location>","client_id":"<client_id>","client_secret":"<client_secret>","scope":["openid","email","profile"],"auth_url":"https://accounts.google.com/o/oauth2/v2/auth","token_url":"https://www.googleapis.com/oauth2/v4/token","issuer_url":"https://accounts.google.com"}]'

Prevent having to log in after sign-up​

When adding social sign-in providers manually, remember to add the session hook to after/oidc/hooks. If you don't add this hook, users will have to log in again after signing up to get a session.

selfservice:
  flows:
    registration:
      after:
        oidc:
          hooks:
            - hook: session