User

{
    "_id": "string",
    "email": "string",
    "apiKey": "string",
    "subscription": {
        "plan": "free",
        "status": "active",
        "creditsRemaining": 0,
        "creditsPerMonth": 0,
        "startDate": "2019-08-24T14:15:22.123Z",
        "endDate": "2019-08-24T14:15:22.123Z"
    },
    "createdAt": "2019-08-24T14:15:22.123Z"
}