For starters, head on over to your Calendly account and click Integrations from the navigation bar
Scroll down until you see the section titled "API & Webhooks" and click it.
From this page, click the "Generate new token" button to open up the token modal.
Give your token a name so you can remember where it is being used, I might suggest naming it "MPCRM".
Once your token has been generated, copy it immediately and paste it somewhere safe, like in a word document. We are going to need that token here in a second.