Twitter的认证

采用HTTP basic认证，如下所示：

#########################
# function: twitter auth
# return value: twitter user status json
# author: Yujie 
# date: 2009.06.15
#########################

my $browser = LWP::UserAgent->new();
$browser->credentials( 'twitter.com:80', 'Twitter API', ARGS{email},    $ARGS{password} );
my $response = $browser->get('http://twitter.com/account/verify_credentials.json');