Retrieve the Farm ID for the server connection URL. This optional property is used in the URL discovery process when connecting through a proxy server or Relay Server. The farmId is substituted into the default URL templates for Relay Server on into a configured urlSuffix. The farmId is used only until a connection is successfully made and the permanent urlSuffix is stored.
@property(readwrite, retain, nonatomic) NSString* farmId;
Returns the Farm ID.