Can I move my cluster from my personal account to a team account?

Yes! When you open your Cluster Dashboard, you'll find an option on the Left Side Nav, all the way at the bottom, saying "Need to share access with your team? Read more".

If you click on that you'll see the option to either create a new team, or select an existing team to migrate your cluster to. 

Please make sure that your team account also has a payment method attached to it before you move your cluster from your personal account to your team account.