The User Token is a code that can be used by third-party apps to access your system. Only paid-access users have access to the User Token. To get your User Token, click on your profile image and then on "My Profile".

You'll see a long code along with other personal information. That’s your User Token.

The API App Key is a code that can be shared with third-party apps to allow them to connect to your account. The account administrator is the only one with access to see the API Key. Just go to "My Profile" and click on the profile photo:

Each user has an individual User Token, but the API App Key code is the same for everyone on the account.

The Runrun.it API is also only available to paying customers.