gistfile1.txt

// so, you have list of users like this

const users = [
    { id: '1', name: 'hello' },
    { id: '2', name: 'world' },
    { id: '3', name: 'hello' },
    { id: '1', name: 'hello' },
    { id: '1', name: 'hello' },
]

// as a result, we want to get list of users without duplicates, basing on id.

const res = [
    { id: '1', name: 'hello' },
    { id: '2', name: 'world' },
    { id: '3', name: 'hello' }
]

// I suggest you, not to use forEach or for methods.