Generate AWT Payload
Generate an AWT payload offline to pass into the generate function to generate an AWT offline.
avnSdk.awtUtils.generateAwtPayload( signer, issuedAt, options )
signer
: The signer object can be derived by runningavnSdk.signer
.issuedAt
: The unix timestamp the token should be issued.options
: The initialisation options for the user.