wrapMongoose.js

    const proto = Object.getPrototypeOf(Mongoose);
    const exec = proto.Query.prototype.exec;
    proto.Query.prototype.exec = wrapAsync(exec); // wrapping exec will wrap most mongoose call
    const Model = proto.Model; // we still need to wrap save and remove here since they do not work like the other methods in mongoose.
    const remove = Model.prototype.remove;
    Model.prototype.remove = wrapAsync(remove, 'mongoose.remove');
    const save = Model.prototype.save;
    Model.prototype.save = wrapAsync(save, 'mongoose.save');