curl --location --request POST 'https://api.openpay.dk/v1/accounts/1234/top_ups' \
--header 'Content-Type: application/json' \
--data-raw '{
"description": "Monthly fee",
"total_amount": "200.00"
}'
{
"id": "1234",
"description": "Monthly fee",
"total_amount": "200.00",
"paid_amount": "0.00",
"currency": "DKK"
}