Setting dryRun to true will result in UNREGISTERED being returned for various scenarios when a token is invalid.
However if dryRun is true, there is at least one scenario when the api will not do the desired validation: if the app associated with the token has reached 270 days of inactivity, the api will not respond with UNREGISTERED.
Is it possible to see if a token is invalid due to the 270d expiration rule without sending a push notification to the device?