Returns the module PAC. For each module, a PAC key is a secret key corresponding to the Sigfox ID. The PAC key will be useful to register a device on a SigFox Network Operator (SNO). As opposed to the SigFox ID, a PAC key is not transferable and must be re-generated if the module’s ownership is changed.
SigFox.PAC();
A String that contains the 16 bytes PAC.