Step 1: Log in to your Smoobu Account then go to Settings > For Developers.
Step 2: Paste this link -> https://app.chargeautomation.com/api/smoobu/booking into the Webhook Url field of Smoobu as shown below.
Step 3: Copy the API Key.
Step 4: Paste the API Key from Smoobu to PMS page in ChargeAutomation.
Step 5: Click Save and Continue.