# File lib/bugzilla/xmlrpc.rb, line 50
    def call(cmd, params = {}, user = nil, password = nil)
      params = {} if params.nil?
      params['Bugzilla_login'] = user unless user.nil? || password.nil?
      params['Bugzilla_password'] = password unless user.nil? || password.nil?
      @xmlrpc.call(cmd, params)
    end