To pair Alexa with Caavo, first you'll need to add the Caavo skill to your Alexa account. Search for Caavo in the skills section of the Alexa app, and then add Caavo as a skill.
Once you've done that, open Caavo, and navigate to Settings > User Accounts > Alexa to find the PIN for your Caavo:
Next, tell Alexa your PIN, in this case it's 3960: "Alexa, tell Caavo my PIN is 3960". Caavo should now be paired, and you can try things like "Alexa, tell Caavo to open Netflix".