curl --location -g --request GET 'https://rest.clicksend.com/v3/post/postcards/export?filename={filename}'
{
"data": {
"url": "https://rest.clicksend.com/files/705F80D0-D044-4F85-8617-081988B398E5?filename=myexport.csv"
},
"http_code": 200,
"response_code": "SUCCESS",
"response_msg": "Download your file here."
}