sub build_json_request {
    my ($url) = @_;
    my $header = ['Authorization' => "Bearer $token", 'Content-Type' => 'form-data'];
    return HTTP::Request->new('POST', $url, $header, {attributes => $c, file=> [ "$Bin/upload.bak" ],} );
}

my $r = build_json_request (ENDPOINT );
my $res = $ua->request($r);