exports.getOneEmail = function(msgId, callback){
var converted = converter.decToHex(msgId);
var hexId = converted.substring(2,converted.length);
var gmail = googleapis.gmail({
version:'v1',
auth: oauth2Client
});
//convert msgId from decimal to hex
//var hexId = Number(msgId).toString(16);
gmail.users.messages.get({
userId: 'me',
id: hexId
}, callback);
};
msgId.forEach(function(d){
var converted = converter.decToHex(d);
var hexId = converted.substring(2,converted.length);
idList.push(hexId);
});