Unable to retrieve data after adding fields to find() from mongo - node.js

Question

I have developed a code where I am able to retrieve all videos from filesystem whose file path is stored in mongo database:
app.get("/myvideos", function(request, result){
database.collection("videos").find({}).toArray(function(error, videos){
result.render("myvideos", {
"isLogin": request.session.user_id ? true : false,
"videos": videos
});
});
});
the above code is retreiving the files properly. However I wish to retrieve files of a particular user. My database schema is:
{
"_id" : ObjectId("60914d02185c2a08add68fa2"),
"user" : {
"_id" : ObjectId("60914c73185c2a08add68fa0"),
"name" : "Saumitra Lele",
"image" : "",
"subscribers" : 0
},
"filePath" : "public/videos/1620135170700-bigbuck.mp4",
"thumbnail" : "public/thumbnails/1620135170700-Photo - Saumitra Lele.jpeg",
"title" : "First video uploaded",
"description" : "First video uploaded by Saumitra Lele",
"tags" : "Saumitra Lele video",
"category" : "Technology",
"createdAt" : 1620135170708,
"minutes" : 0,
"seconds" : 32,
"hours" : 0,
"watch" : 1620135170708,
"views" : 0,
"playlist" : "",
"likers" : [ ],
"dislikers" : [ ],
"comments" : [ ]
}
However when I try to retrieve files of a particular user like so it doesn't work:
app.get("/myvideos", function(request, result){
database.collection("videos").find({user:{_id:{$in:[user._id]}).toArray(function(error, videos){
result.render("myvideos", {
"isLogin": request.session.user_id ? true : false,
"videos": videos
});
});
});

Answer 1

I got the solution. This worked:
When user session got logged in, I created a new variable to store user name like so:
request.session.user_name = user.name
Then used the above for comparison as:
app.get("/myvideos", function(request, result){
//var logInId = request.session.user_id;
database.collection("videos").find({"user.name":request.session.user_name}).sort({
"createdAt": -1
}).toArray(function(error, videos){
result.render("myvideos", {
"isLogin": request.session.user_id ? true : false,
"videos": videos
});
});
});
And the above worked properly!