List subscriptions

{  "object": "list",  "data": [    {      "id": "sub_1a2b3c4d",      "customerId": "cus_1a2b3c4d",      "plan": {        "id": "plan_1a2b3c4d",        "name": "Pro"      },      "name": "Pro",      "description": null,      "status": "active",      "billingInterval": "monthly",      "trialEndsAt": null,      "currentPeriod": {        "start": "2026-09-07T12:00:00.000Z",        "end": "2026-10-07T12:00:00.000Z",        "daysRemaining": 30      },      "cancellation": null,      "cancelAtPeriodEnd": false,      "scheduledPlanChange": null,      "startDate": "2026-09-07T12:00:00.000Z",      "endDate": null,      "billingDayOfMonth": 7,      "nextBillingDate": "2026-10-07T12:00:00.000Z",      "checkoutUrl": null,      "createdAt": "2026-09-07T12:00:00.000Z",      "updatedAt": "2026-09-07T12:00:00.000Z",      "offerApplications": [],      "pause": null,      "priceId": "price_1a2b3c4d",      "object": "subscription",      "livemode": false    }  ],  "hasMore": false}

{  "error": {    "type": "validation_error",    "code": "validation_error",    "message": "The request contains an invalid parameter.",    "doc_url": "https://commet.co/docs/api-reference/2026-08-27/errors/validation_error.md"  }}

{  "error": {    "type": "authentication_error",    "code": "unauthorized",    "message": "A valid API key is required.",    "doc_url": "https://commet.co/docs/api-reference/2026-08-27/errors/unauthorized.md"  }}

{  "error": {    "type": "authentication_error",    "code": "forbidden",    "message": "You do not have permission to perform this operation.",    "doc_url": "https://commet.co/docs/api-reference/2026-08-27/errors/forbidden.md"  }}

{  "error": {    "type": "rate_limit_error",    "code": "rate_limited",    "message": "Too many requests. Retry after the interval specified in the Retry-After header.",    "doc_url": "https://commet.co/docs/api-reference/2026-08-27/errors/rate_limited.md"  }}

{  "error": {    "type": "internal_error",    "code": "internal_error",    "message": "An unexpected error occurred while processing the request.",    "doc_url": "https://commet.co/docs/api-reference/2026-08-27/errors/internal_error.md"  }}