List all actively connected gateways
Returns a list of all of the gateway connections that are currently active across all Itential Platforms.
Authentication
AuthorizationBasic
Basic authentication of the form Basic <base64(username:password)>.
Response
An object containing keys for the cluster Ids for all gateways that have been added to Gateway Manager and values for whether or not the gateway is connected or disconnected
Errors
500
Internal Server Error
