curl --request PATCH \
  --url https://api.fungies.io/v0/users/{userId}/update \
  --header 'Content-Type: application/json' \
  --header 'x-fngs-public-key: <api-key>' \
  --header 'x-fngs-secret-key: <api-key>' \
  --data '{
  "email": "test@example.com",
  "password": "Password123!",
  "username": "test-user",
  "internalId": "abcd-1234-5678-90ab-cdef-1234-5678-90ab",
  "billingDetails": {
    "countryCode": "US",
    "postalCode": "94101"
  },
  "paymentData": {
    "stripeCustomerId": "cus_QzHuLRwfKfp2WX"
  }
}'

{
  "status": "<string>",
  "data": {
    "user": {
      "object": "user",
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "username": null,
      "email": null,
      "details": null,
      "internalId": null
    }
  }
}