To activate and use Zapier on the account, please follow the steps below -

 1. Settings >> API and Hooks
2. Click on the key to View / Generate keys 

After you generate the keys, click on the server you are using.

At this point, it will ask you to sign in or register with Zapier. Once you are signed in, you will see a screen like the one below. Click Accept Invite & Build a Zap.

You can start adding your Apps and create the TempBuddy zaps that you want via Zapier.