Step 1: Click on this page https://developers.line.biz/en/ and log in with your Line account.
Step 2: Click "Create new provider" button
Enter provider name and click Confirm
When you successfully created a provider, select "Create channel for Line Login API"
Step 3: Enter channel information
Agree with LINE Developers Agreement > Click "Create"
Step 4: Open the newly created app
Navigate to "App settings" tab. Click "Edit" button to add Callback URL.
Step 5: Fill in Callback URL > Click "Update" button
Step 6: Head back to Channel settings tab > Scroll down to copy Channel ID and Channel secret to Social Login Pro app configuration page