【解決方法】JSON でクエリを実行する方法

const user = [
{
    "userid" : "1",
    "emailid" : "xyz@gmail.com",
    "password" : "xyz123",
    "cards" : [
        {
            "parentUId" : "1",
            "cardId" : "1A",
            "cardTitle" : "Buy Vegetables",
            "tasks" : [{
                "parentCId" : "1A",
                "taskId" : "1A1",
                "taskTitle" : "Tomato",
                "isCompleted" : false
            }, {
                "parentCId" : "1A",
                "taskId" : "1A2",
                "taskTitle" : "Onion",
                "isCompleted" : false
            }]
        },
        {
            "parentUId" : "1",
            "cardId" : "1B",
            "cardTitle" : "Buy Fruits",
            "tasks" : [{
                "parentCId" : "1B",
                "taskId" : "1B1",
                "taskTitle" : "Mango",
                "isCompleted" : false
            }, {
                "parentCId" : "1B",
                "taskId" : "1B2",
                "taskTitle" : "Apple",
                "isCompleted" : false
            }]
        }
    ]
},
{
    "userid" : "2",
    "emailid" : "abc@gmail.com",
    "password" : "abc123",
    "cards" : [
        {
            "parentUId" : "1",
            "cardId" : "2A",
            "cardTitle" : "Buy Vegetables",
            "tasks" : [{
                "parentCId" : "2A",
                "taskId" : "2A1",
                "taskTitle" : "Tomato",
                "isCompleted" : false
            }, {
                "parentCId" : "2A",
                "taskId" : "2A2",
                "taskTitle" : "Onion",
                "isCompleted" : false
            }]
        }
    ]
}
]

let uid = "2"
let cdTitle = "Buy Vegetables"


console.log(user[userid = uid].cards[cardTitle = cdTitle].tasks)

[*][*]私が試したこと：[*][*]

エラー表示中です。[*]
json でクエリを実行する方法。[*]
良い例と演習をいただければ幸いです