|Attribute Name||Attribute Type||Attribute Description|
|String||Id of the user who installed the app||User identifier|
|String||API access Authentication token for this the user|
No return value is required for this event. However, a 200 OK status code is expected for the installation to be considered successful. In case a 200 status code is not received as response to this event, by default Flock will assume failure and present an installation failure message to the user.