Create customer

curl --request POST \
  --url https://app.flowglad.com/api/v1/customers \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '{
  "customer": {
    "email": "<string>",
    "name": "<string>",
    "archived": true,
    "logoURL": "<string>",
    "iconURL": "<string>",
    "domain": "<string>",
    "externalId": "<string>",
    "userId": "<string>",
    "catalogId": "<string>"
  }
}'

{
  "data": {
    "customer": {
      "id": "<string>",
      "createdAt": "2023-11-07T05:31:56Z",
      "updatedAt": "2023-11-07T05:31:56Z",
      "livemode": true,
      "organizationId": "<string>",
      "email": "<string>",
      "name": "<string>",
      "invoiceNumberBase": "<string>",
      "archived": true,
      "logoURL": "<string>",
      "iconURL": "<string>",
      "domain": "<string>",
      "billingAddress": {
        "name": "<string>",
        "firstName": "<string>",
        "lastName": "<string>",
        "address": {
          "line1": "<string>",
          "line2": "<string>",
          "city": "<string>",
          "state": "<string>",
          "postal_code": "<string>",
          "country": "<string>"
        },
        "phone": "<string>"
      },
      "externalId": "<string>",
      "userId": "<string>",
      "catalogId": "<string>"
    }
  }
}