无法使用mongodb sync打开Realm

我无法打开领域。我的设置有问题。这是应用程序中的代码：

var configuration = user.configuration(partitionValue: "user=\(user.id)")
configuration.objectTypes = [User.self]
Realm.asyncOpen(configuration: configuration) { [weak self](userRealm, error) in
                self!.setLoading(false);
                guard error == nil else {
                    fatalError("Failed to open realm: \(error!)").   ///// here was my error before the edit (I changed the Permission Settings in Sync)
                }

错误代码：“致命错误：无法打开领域：错误Domain = io.realm.unknown Code = 89”操作已取消” UserInfo = {Category = realm.basic_system，NSLocalizedDescription =操作已取消，错误代码= 89”

Mongodb Sync配置屏幕截图

编辑：用“任务跟踪器”应用中提到的那些替换了“同步”中的“权限”设置，并使其连接起来：

编辑：根据杰伊的建议，配置设置已更改为以下内容。

var configuration = user.configuration(partitionValue: "\(currentUser.id!)")

这是我对User Collection的Scheme定义：

{
"properties": {
"_id": {
  "bsonType": "string"
},
"_partition": {
  "bsonType": "string"
},
"name": {
  "bsonType": "string"
}
},
"required": [
   "_id",
   "_partition",
   "name"
],
"title": "User"
}

这是我在Xcode中的User类：

class User: Object {
@objc dynamic var _id: String = ""
@objc dynamic var _partition: String = ""
@objc dynamic var name: String = ""
override static func primaryKey() -> String? {
    return "_id"
}
}

EDIT: I got this going to establish a connection by updating the Sync Permissions, so the app does not crash any more. However, now I am getting this message:

Connection to daemon was invalidated
Signup successful!
Log in as user: y
Login succeeded!
2020-10-25...Sync: Connection[1]: Session[1]: client_reset_config = false, Realm exists = false, async open = false, client reset = falseSync: Connection[1]: Session[1]: client_reset_config = false, Realm exists = false, async open = false, client reset = false
2020-10-25...Sync: Connection[1]: Connected to endpoint '13.54.209.90:443' (from '.....:52139')
2020-10-25...Sync: Connection[1]: Reading failed: End of input
2020-10-25...Sync: Connection[1]: Connection closed due to error```

I don't understand that the error "("Failed to open realm: (error!)")" in my above code is not triggered, but then in the log it says that the realm does not exist! So, what's going on here?

EDIT : this is the user table in mongodb, so I created some Users successfully.

EDIT : This is the log from mongodb

As we can see the User Id and the Request ID are not the same! I guess that the two IDs should be the same string in order to be authenticated, right??

I am following the Task Tracker app tutorial from the mongodb webpage for Swift to add the user login to my app. What am I missing here?