Behaviour implemented by PingPong notification services.
A service receives a payload map and an options map, validates the data it needs, performs delivery, and returns a PingPong result tuple.
Summary
Callbacks
Delivers a notification using service-specific payload and options.
Callbacks
@callback call(PingPong.payload(), PingPong.options()) :: PingPong.result()
Delivers a notification using service-specific payload and options.
Implementations should return {:ok, response} on success and an error tuple
on failure.