https://www.npmjs.com/package/jsonwebtoken#jwtsignpayload-secretorprivatekey-options-callback
payload could be an object literal, buffer or string. Please note that exp is only set if the payload is an object literal.
https://www.npmjs.com/package/jsonwebtoken#jwtsignpayload-secretorprivatekey-options-callback
payload could be an object literal, buffer or string. Please note that exp is only set if the payload is an object literal.