curl --location --request POST '/api/v1/subscriptions//metered-invoices' \
--header 'Authorization: <api-key>' \
--header 'Content-Type: application/json' \
--data-raw '{
"amount": "string",
"currency": "str",
"usage_description": "string",
"due_date": "2019-08-24T14:15:22.123Z",
"charge_schedule": "immediate",
"metadata": {}
}'{
"success": true,
"data": {
"invoice": {},
"eip712": {},
"auth": {}
}
}