curl --request GET \
  --url https://api.lava.so/v1/customers \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "customer_id": "con_test_01EXAMPLE00000000000000001",
      "reference_id": "usr_abc123",
      "contact": {
        "phone": "+14155552671",
        "email": "user@example.com",
        "first_name": "Jane",
        "last_name": "Smith"
      },
      "subscription": {
        "subscription_id": "<string>",
        "plan_id": "<string>",
        "name": "<string>"
      },
      "metadata": {
        "plan_tier": "enterprise",
        "internal_id": "12345"
      },
      "created_at": "2023-05-15T08:35:42Z"
    }
  ],
  "has_more": true,
  "next_cursor": "<string>"
}