curl --request POST \
  --url https://api.decodahealth.com/billing/insurance-payment/create-rainforest-payin-config \
  --header 'API-KEY: <api-key>' \
  --header 'Content-Type: application/json' \
  --header 'TENANT: <tenant>' \
  --data '
{
  "id": "<string>",
  "insurer": "<string>",
  "amount": 123,
  "comment": "<string>",
  "currency": "USD",
  "locationId": "<string>",
  "creatorId": "<string>"
}
'

{
  "sessionKey": "<string>",
  "payinConfigId": "<string>",
  "sandbox": true,
  "paymentMethods": []
}