# File lib/termtter/api.rb, line 50
      def try_auth
        if config.user_name.empty? || config.password.empty?
          puts 'Please enter your Twitter login:'
        end

        ui = create_highline

        if config.user_name.empty?
          config.user_name = ui.ask('Username: ')
        else
          puts "Username: #{config.user_name}"
        end
        if config.password.empty?
          config.password = ui.ask('Password: ') { |q| q.echo = false}
        end

        twitter = RubytterProxy.new(config.user_name, config.password, twitter_option)
        begin
          twitter.verify_credentials
          return twitter
        rescue Rubytter::APIError
          config.__clear__(:password)
        end
        return nil
      end