docs: function generateAuthorizationHeaderValue(signedHeaders, signKey, signingMsg) {
  		var signature = CryptoJS.HmacSHA256(signingMsg, signKey);
  		var authHeader = 'SNWS2 Credential=' +cred.token
  			+',SignedHeaders=' +signedHeaders.join(';')
  			+',Signature=' +CryptoJS.enc.Hex.stringify(signature);
  		return authHeader;
  	}