Using Calliflower Connect is simple. Log in to your account on the Calliflower web dashboard. If your meeting is currently active, the green menu bar near the top will have a call button that will show you your calling options when you click it.
Click the green 'Call Now' button to call using Calliflower Connect. Your browser will then ask you to accept media permissions so that you can use your microphone with Calliflower. Once you've done that, you will be connected straight to your call, without needing to enter a PIN.