comment: {
    bsonType: "object",
    description: "must be an object and is optional",
    required: ["_id", "linkId", "body", "score","isRemoved"],
    properties: {
        _id: {
            bsonType: "objectId",
            description: "must be an objectId and is required"
        },
        linkId: {
            bsonType: "objectId",
            description: "must be an objectId and is required"
        },
        body{
            bsonType: "string",
            description: "must be a string and is required"
        },
        score{
            bsonType: "int",
            description: "must be an int and is required"
        },
        isRemoved{
            bsonType: "bool",
            description: "must be an boolean and is required"
        }
    }
},
user: {
    bsonType: "object",
    description: "must be an object and is optional",
    required: ["_id", "firstName", "lastName", "password"],
    properties: {
        _id: {
            bsonType: "objectId",
            description: "must be an objectId and is required"
        },
        firstName: {
            bsonType: "string",
            description: "must be an string and is required"
        },
        lastName: {
            bsonType: "string",
            description: "must be an string and is required"
        },
        password: {
            bsonType: "string",
            description: "must be an string and is required"
        },
        activationToken: {
            bsonType: "string",
            description: "must be an string and is not required"
        },
        resetPasswordToken: {
            bsonType: "string",
            description: "must be an string and is not required"
        },
        linkSearchHistory: [
            link:{
                bsonType: "object",
                description: "must be an object and is optional",
                required: ["linkId", "searchDate, "minScore","ammount"],
                properties: {
                    linkId:{
                        bsonType: "objectId",
                        description: "must be an objectId and is required"
                    },
                    searchDate:{
                        bsonType: "date",
                        description: "must be an objectId and is required"
                    },
                    threadTitle:{
                        bsonType: "string",
                        description: "must be an objectId and is not required"
                    },
                    minScore:{
                        bsonType: "int",
                        description: "must be an objectId and is required"
                    },
                    ammount:{
                        bsonType: "int",
                        description: "must be an objectId and is required"
                    }
                }
            }
        ]}
    }
},
sessions: {
    bsonType: "object",
    description: "must be an object and is optional",
    required: ["_id", "session_id"],
    properties:{
        _id: {
            bsonType: "objectId",
            description: "must be an objectId and is required"
        },
        session_id: {
            bsonType: "string",
            description: "must be an string and is required"
        },
        session_attributes{
            bsonType: "string",
            description: "must be an string and is required"
        }
    }
}