==== Facebook

There are a number of steps you have to complete to be able to login to Facebook.  First, go to the `Identity Providers` left menu item
and select `Facebook` from the `Add provider` drop down list.  This will bring you to the `Add identity provider` page.

.Add Identity Provider
image:../../../{{book.images}}/facebook-add-identity-provider.png[]

You can't click save yet, as you'll need to obtain a `Client ID` and `Client Secret` from Facebook.  One piece of data you'll need from this
page is the `Redirect URI`.  You'll have to provide that to Facebook when you register {{book.project.name}} as a client there, so
copy this URI to your clipboard.

To enable login with Facebook you first have to create a project and a client in the https://developers.facebook.com/[Facebook Developer Console].

NOTE: Facebook often changes the look and feel of the Facebook Developer Console, so these directions might not always be up to date and the
      configuration steps might be slightly different.

Once you've logged into the console there is a pull down menu in the top right corner of the screen that says `My Apps`.  Select the `Add a New App`
menu item.

.Add a New App
image:../../../images/facebook-add-new-app.png[]


Select the `Website` icon.  Click the `Skip and Create App ID` button.

.Create a New App ID
image:../../../images/facebook-create-app-id.png[]

The email address and app category are required fields.  Once you're done with that, you will be brought to the dashboard
for the application.  Click the `Settings` left menu item.

.Create a New App ID
image:../../../images/facebook-app-settings.png[]

Click on the `+ Add Platform` button at the end of this page and select the `Website` icon.  Copy and paste the `Redirect URI` from the
{{book.project.name}} `Add identity provider` page into the `Site URL` of the Facebook `Website` settings block.

.Specify Website
image:../../../images/facebook-app-settings-website.png[]

After this it is necessary to make the Facebook app public. Click `App Review` left menu item and switch button to "Yes".

You will need also to obtain the App ID and App Secret from this page so you can enter them into the {{book.project.name}} `Add identity provider` page. To obtain this click on the `Dashboard` left menu item and click on `Show` under `App Secret`. Go back to {{book.project.name}} and specify those items and finally save your Facebook Identity Provider.

One config option to note on the `Add identity provider` page for Facebook is the `Default Scopes` field.
This field allows you to manually specify the scopes that users must authorize when authenticating with this provider.
For a complete list of scopes, please take a look at https://developers.facebook.com/docs/graph-api. By default, {{book.project.name}}
uses the following scopes: `email`.