Step 1: Create your app in Facebook Developer Console

• Open https://developers.facebook.com/ and login with your Facebook credential
• Click on Create App button
• Select App Type – Consumer and continue

• Enter App Display Name and Contact email and click on Create App button

• You will land on Dashboard

 Step 2: Enter all basic details

• From the menu on the left side open Settings → Basic

• Enter Privacy Policy URL(Mandatory) and User Data Deletion detail (Mandatory)
• Enter other details – App Icon, App Category, App Purpose, etc.

• Change App Mode – Set to Live

Step 3: Permissions and Features

• From the menu on the left side open App Review → Permissions and Features
• Get Advance Access for public_profile and email

Step 4: Complete Data Checkup 

Step 5: Add Product

• From the menu on the left side open Add Product
• Click on Facebook Login – Set Up

• Go to Quick Start
• Settings for Android App
  • Select Android
    • Click Next on first 2 steps
    • Enter Package name (We will provide you)
    • Enter Default Activity class name (We will provide you)
    • Save and Continue
    • Enter Key Hashes (We will provide you)
    • Save and Continue

• Settings for iOS App
  • Select iOS
    • Click Next on 1st step
    • Enter Bundle ID (We will provide you)
    • Save and Continue

Step 6: Provide us Your App Details

• Provide us App Id, App Secret and Display Name from Basic settings.

• Provide us Client Token from Advanced settings.