The app ID for the Ditto instance.
siteID needs to be an unsigned 64 bit integer >= 0, i.e. either a
number or a
BigInt in the range between 0 and
2^64 - 1 (inclusive). If
0, Ditto will generate an
appropriate site ID and persist it when needed. Default is
An identity to be used while in development when you want to control the app name and the site ID of the peer.