I am using async waterfall like this

const profileRichness = () => {
    async.waterfall([
        getTargetUsers,
        filterUser,
        
    ], (err) => {
        if (err) errorlogger(uuid(), err, "email", "abc", "acc", "acd");
        else console.log('Done');
    });
}

Fn that I am calling

const getTargetUsers = (callback,condition) => {
    user.getUsers(condition, (err, result) => {
        if (err)
            callback(err);
        else {

            if (result.length)
                callback(null, result);
            else
                callback('No user found');
        }
    });
}

const filterUser = (users, callback) => {
    users = users.filter(user => {
        if (!user.age || user.profile < 80) return user;
        else return false;
    }).filter(user => user);
    callback(null,users);
}

Problem is whatever I am trying to pass in first function of waterfall it returns error that "callback is not a function" what is exactly going on