curl --request POST \
  --url https://api.pcxpay.com/v1/payments/bank-validation/truelayer/callback \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "code": "<string>",
  "state": "<string>"
}
'

{
  "success": true,
  "access_token": "<string>",
  "refresh_token": "<string>",
  "expires_in": 123,
  "user_id": "<string>",
  "message": "<string>"
}