You may need to setup Facebook login for your mobile App that you have created. To use this login you will need to make sure you've registered your Facebook app with Facebook and have an APP_ID. If you have the desired APP_ID, directly go to step 10, else follow these steps:
Enter the Contact Email and Display Name in the pop-up opened.
After entering the details, you can click on Add product in the sidebar. There you will see options like Facebook login, Audience network etc. Click on Facebook login to setup Facebook login for your mobile app.
Select Android as the platform.
Go to step 3 by clicking on the Next button.
Enter the package name of your app. It would be in the format com.storehippo.app, in the Mobile App section in the StoreHippo Admin panel.
Enter the Default Activity Class Name as your package name with the application name in camelCase format i.e. com.storehippo.app.myApp.
Generating a Release Key Hash. If you have your custom key, then generate the hash of the key using the command shown on Facebook.
If you are using StoreHippo inbuilt android build then the hash is FSeumKoPkwVPah7xmR6I2TMpqq4=
Enable Single Sign-On for Your App.
Fill up the form.
Go to the App Review section in the sidebar and make your app live for production use.
From the dashboard in the sidebar, copy the App ID and the name of the application.
Enter the details in Social login section as shown: