Identify a User

FS.identify(uid, customVars?)

Each time a page loads from a user you can identify, you'll want a bit of JavaScript to call the FS.identify function to associate your own application-specific id with the active user.


uidA string containing your unique identifier for the current user.
customVarsA JSON object with key/value pairs that provides additional information about your user (optional).


  • Sustained calls are limited to 12 calls per minute, with a burst limit of 5 calls per second.

Additional Information