const key = await fetch('/public/v1/key/multiple-activate', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'X-API-Key': 'YOUR_KEY'
},
body: JSON.stringify({
quantity: 1,
packageIds: [1],
duration: 30,
unit: 'day',
activateCount: 5
})
}).then(r => r.json())
.then(d => d.data[0]);