Migrating from OAuth 2.0 to OpenID Connect

OAuth 2.0 is being deprecated and replaced by OpenID Connect. Refer to the product documentation to convert your existing OAuth service provider configuration for Google Apps to the OpenID Connect standard.

Configuring Google Apps as a Single Sign-On (SSO) service

Follow these steps to configure Mattermost to use Google as a Single Sign-on (SSO) service for team creation, account creation, and sign-in.

Note

The Google People API has replaced the Google+ API, which was deprecated by Google as of March 7th, 2019 per their notice.

Step 1: Create OpenID Connect project in Google API Manager

  1. Go to Google Cloud Platform.

  2. Select Credentials in the left-hand sidebar.

  3. Select Create Credentials, then select OAuth client ID.

  4. Select the Web application as the application type.

  5. Enter Mattermost-<your-company-name> as the Name, replacing <your-company-name> with the name of your organization.

  6. Under Authorized redirect URIs, select Add URL, then enter {your-mattermost-url}/signup/google/complete. For example: http://localhost:8065/signup/google/complete.

  7. Select Create.

  8. Copy and paste the Your Client ID and Your Client Secret values to a temporary location. You will enter these values in the Mattermost System Console.

../_images/create-google-sso-credentials.png ../_images/select-google-sso-web-app.png ../_images/google-sso-web-app-name.png ../_images/google-sso-redirect-uri.png ../_images/google-sso-credentials.png

Step 2: Enable Google People API

Go to the Google People API, then select Enable in the header. This might take a few minutes to propagate through Google’s systems.

Step 3: Configure Mattermost for Google Apps SSO

  1. Log in to Mattermost, then go to System Console > Authentication > OpenID Connect.

  2. Select Google Apps as the service provider.

  3. The Discovery Endpoint for OpenID Connect with Google Apps is prepopulated with https://accounts.google.com/.well-known/openid-configuration.

  4. Paste in the Client ID from Google in Mattermost.

  5. Paste in the Client Secret from Google in Mattermost.

  6. Select Save.

Note

When Mattermost is configured to use OpenID Connect or OAuth 2.0 for user authentication, the following user attribute changes can’t be made through the Mattermost API: first name, last name, or username. OpenID Connect or OAuth 2.0 must be the authoritative source for these user attributes.