json parse not correctly generate array [duplicate]

Question

I try to parse the following string which i get via an http endpoint into an array JSON.parse:

const jsonstring = "{ id: 'Nmq85HbJNnBMFCbCZ', users: [ "A1", "A2", "A3" ] }"
const json = JSON.parse(jsonstring); // outputs: { id: 'Nmq85HbJNnBMFCbCZ', users: [ 'A1', 'A2', 'A3' ] }

But when i access the array, there is:

for( const element in json.users ) console.log('Element:', element); // Element is 0, 1, 2... instead of A1, A2, A3

What am i doing wrong?