Step 1: Log in to your Smoobu Account then go to Settings > For Developers.
Step 2: Copy 'https://app.chargeautomation.com/api/smoobu/booking' in the Webhook Url field then Save.
Step 3: Copy the API Key.
Step 4: Paste the API Key from Smoobu to PMS page in Charge Automation.
Step 5: Click on Save and Continue.