curl --request GET \
  --url https://sandbox.hyperswitch.io/v2/customers/list \
  --header 'api-key: <api-key>'

[
  {
    "id": "12345_cus_01926c58bc6e77c09e809964e72af8c8",
    "merchant_reference_id": "cus_y3oqhf46pyzuxjbcn2giaqnb44",
    "connector_customer_ids": {},
    "name": "Jon Test",
    "email": "JonTest@test.com",
    "phone": "9123456789",
    "phone_country_code": "+65",
    "description": "First Customer",
    "default_billing_address": {
      "city": "New York",
      "country": "AF",
      "line1": "123, King Street",
      "line2": "Powelson Avenue",
      "line3": "Bridgewater",
      "zip": "08807",
      "state": "New York",
      "first_name": "John",
      "last_name": "Doe",
      "origin_zip": "08807"
    },
    "default_shipping_address": {
      "city": "New York",
      "country": "AF",
      "line1": "123, King Street",
      "line2": "Powelson Avenue",
      "line3": "Bridgewater",
      "zip": "08807",
      "state": "New York",
      "first_name": "John",
      "last_name": "Doe",
      "origin_zip": "08807"
    },
    "created_at": "2023-01-18T11:04:09.922Z",
    "metadata": {},
    "default_payment_method_id": "12345_pm_01926c58bc6e77c09e809964e72af8c8",
    "tax_registration_id": "123456789"
  }
]