x-api-key: ********************curl --location -g --request GET 'https://relay.exostack.cloud//api/customers/extract?cursor_modified_at&cursor_card_pos&limit&brief' \
--header 'x-api-key: <api-key>'{
"items": [
null
],
"count": 0,
"has_more": false,
"next_cursor": {
"modified_at": "2019-08-24T14:15:22.123Z",
"card_pos": 0
}
}