Create payment account

curl --request POST \
  --url https://api.case.dev/payments/v1/accounts \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "type": "trust",
  "currency": "usd",
  "parent_account_id": "<string>",
  "matter_id": "<string>",
  "metadata": {}
}
'

{
  "id": "<string>",
  "organizationId": "<string>",
  "name": "<string>",
  "type": "<string>",
  "currency": "<string>",
  "cachedBalance": 123,
  "cachedAvailableBalance": 123,
  "isActive": true,
  "createdAt": "<string>"
}