Following these steps you will connect Paddle to Digger
To integrate Paddle in Digger tool follow these steps:
1. Go to Navigation Bar > Integrations > Payment Provider.
2. Click “Connect to Paddle 
3. Insert your Bearer Token\API Key that you have in your Paddle Dashboard
Finished
The Paddle onboarding is done.
Where to find my Bearer Token\API Key in the Paddle?
Here is the link: https://developer.paddle.com/api-reference/about/authentication