Check the Social Providers document to check the client configuration.
You can use your own Decidim application to log in to other applications that support OAuth 2. To do it you need to create an OAuth application from the admin panel for each client that wants to use Decidim.
To create a new OAuth application you need:
Name: The name of the client application that will be shown to the user when authorizing it from your Decidim application.
Redirect URI: The URI where the Decidim application should redirect the user after authorizing it. It is usually where you handle the OAUth callback in your client application. If you’re using
omniauth-decidimthe value should be
Organization name: The name of the organization that owns the client application.
Organization URL: The URL of the organization that owns the client application.
Organization logo: An image of the logo of the organization that owns the client application.
All the organization data will be used during the authorization process so the users know to who they’re giving their data.
Once you’ve created your application you’ll get the settings to setup your client.
Check omniauth-decidim in order to configure your client application.