fix the double request workaround

[kalab-oto]

The first request after login returns empty results. Fix this workaround. Try add checking the page in isop_login() function.

rndop/R/ndop_search.R

Lines 61 to 66 in b77af84

	for (i in 1:2){
	filter_page <- httr::POST(SEARCH_URL,
	body = search_payload,
	config = httr::set_cookies(
	isop_loginhash = isop_loginhash))
	}