I have a function named getActiveUsers which helps me to find active users

const getActiveUsers = async (req, res) => {
let results = [];

const rewards = await Reward.find().distinct('data');

await rewards.map(async (reward) => {
    const result = await Callback.findOne({
        data: reward,
    });
    results.push(result);
});

return res
    .status(400)
    .json({ success: true, count: results.length, data: results })};

I first want to get data from Reward collection, which will return 100 records to rewards array. After waiting for all the results, I want to go through the retrieved array(rewards) one by one, and get data from another collection called Callback. And this data will be pushed to another array called results one by one.(I have used a map function for that) After awaiting for all 100 records to results array, I want to send it as the response. But unfortunately, my code does not wait for the map function. It send response as a empty array(results). And later runs the map and pushes elements to results array. Please help me fix this by using async/await only. If it is not possible, give me the best solution.