Solution 1:

A populate have following things

Post.find({})
.populate([
    // here array is for our memory. 
    // because may need to populate multiple things
    {
        path: 'user',
        select: 'name',
        model:'User',
        options: {
            sort:{ },
            skip: 5,
            limit : 10
        },
        match:{
            // filter result in case of multiple result in populate
            // may not useful in this case
        }
    }
])
.exec((err, results)=>{
   console.log(err, results)
})

Solution 2:

If you want to use mongoose-paginate, You can do the following

var query = {};
var options = {
  sort: { date: -1 },
  populate: 'users',
  lean: true,
  offset: offset, 
  limit: 10
};

Post.paginate({}, options, (err, result) => {
 //....
})