SAAJ adding mime headers for server authrorization

I need to pass login information to server when sending SOAP request. Do I use MimeHeaders to carry username/passwrod pair?

...

SOAPMessage message = factory.createMessage();

String authorization = Base64.encode("username:password".getBytes());

MimeHeaders mimeheaders = message.getMimeHeaders();

mimeheaders.addHeader("Authorization","Basic " + authorization);

[474 byte] By [basti78a] at [2007-11-27 4:05:41]