I need to render a cards based on a array of objects from the API response, which look like this (simplified):

```
[
{
    name: 'John',
    vouchers: [
        {
            voucherId: 1,
            issuedAt: '2020-12-15T16:26:36.3548091+01:00'
        },
        {
            voucherId: 2,
            issuedAt: '2020-12-15T16:26:36.3548091+01:00'
        },
    ]
},
{
    name: 'Lisa',
    vouchers: [
        {
            voucherId: 1,
            issuedAt: '2020-12-13T16:26:36.3548091+01:00'
        }
    ]
}]

```

Now I want to NgFor over this array of objects (with in it an array of objects) and sort (the outer object) based on the 'issuedAt' date.

note: the issuedAt date for the array of vouchers is always the same for each user.

I was thinking of some combination of using .map => .sort => Number(new Date(DATE\_HERE)), but couldn't get it to work