const session = await mongoose.startSession();
session.startTransaction();
const opts = { session, new: true };
tableModel = MYMODEL.(data);
tableModel.save(async function(err, response) {
  if (err) return handleError(err, res);
  else {
    try {
      console.log('Mongo success');
      await session.abortTransaction();
      session.endSession();
      console.log("rolled back")
    }
    catch(e) {
      next(e)
    }
  }
});