Setup the following as environment variables using the
NESTOR_ENVOY_API_KEY- API Key for Envoy obtained from the "Advanced" section in the Envoy dashboard.
envoy guests <timeframe>: List all guests who have signed in the given timeframe
<timeframe> can be something like "last tuesday 10am-2pm" or "monday"
The source for this app is available at asknestor-apps/envoy.