use LWP::UserAgent qw();
use JSON::MaybeXS qw(decode_json);
my $ua = LWP::UserAgent->new;
my $res = $ua->get('https://ru.wikipedia.org/w/api.php?action=query&format=json&formatversion=2&list=allusers&auactiveusers&aufrom=%D0%91');
die $res->status_line unless $res->is_success;
my $json_OCTETS = $res->content;
my $all_users_CHARACTERS = decode_json $json_OCTETS;
my $continue_aufrom_CHARACTERS = $all_users_CHARACTERS->{continue}{aufrom};