my $bliz = LWP::Authen::OAuth2->new(%auth,
token_endpoint => 'https://eu.battle.net/oauth/token',
request_required_params => [qw( client_id client_secret grant_type )],
my $bliz = LWP::Authen::OAuth2->new(%auth,
token_endpoint => 'https://eu.battle.net/oauth/token',
request_required_params => [qw( client_id client_secret grant_type )],