To connect your Checkin account with Boom, please follow these steps:
Log in to your Checkin account and generate an API key. Be sure to save it, as you’ll need to enter it in Boom (at step 4c).
In Boom open Configuration ⏵ Settings ⏵ Integrations
Locate Checkin and click on the "Settings" button
Update the fields:
Enter your checkin account username
Enter your checkin account password
Enter the API key you generated in step 1
Click Save