curl --request GET \
  --url https://api.example.com/api/v1/customers/{customer_id} \
  --header 'x-api-key: <x-api-key>'

{
  "customer": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "email": "<string>",
    "name": "<string>",
    "nomba_customer_id": "<string>",
    "created_at": "2023-11-07T05:31:56Z"
  },
  "subscriptions": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "plan_name": "<string>",
      "status": "<string>",
      "amount": 123,
      "currency": "<string>",
      "interval": "<string>",
      "current_period_start": "2023-11-07T05:31:56Z",
      "current_period_end": "2023-11-07T05:31:56Z",
      "cancelled_at": "2023-11-07T05:31:56Z"
    }
  ],
  "invoices": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "amount": 123,
      "currency": "<string>",
      "status": "<string>",
      "due_date": "2023-11-07T05:31:56Z",
      "paid_at": "2023-11-07T05:31:56Z"
    }
  ]
}