solidus_social

Add this extension to your Gemfile:. Preference(optional): By default url will be '/users/auth/:provider'. If you wish to modify the url to: '/member/auth/:provider', '/profile/auth/:provider', or '/auth/:provider' then you can do this accordingly in your config/initializers/spree.rb file as described below -.
Login as an admin user and navigate to Configuration > Social Authentication Methods. Click on the New Authentication Method button to enter the key obtained from their respective source, (See below for instructions on setting up the various providers). Multiple key entries can now be entered based on the rails environment. This allows for portability and the lack of need to check in your key to your repository. You also have the ability to enable and disable sources. These setting will be reflected on the client UI as well. Alternatively you can ship keys as environment variables and create these Authentication Method records on application boot via an initializer. Below is an example for facebook.
OAuth Applications @ Facebook, Twitter and / or Github are supported out of the box but you will need to setup applications are each respective site as follows for public use and for development. All URLs must be in the form of domain.tld you may add a port as well for development.