# File lib/twitter/cli.rb, line 140
    def run
      do_work do
        if params['username'].given?
          new_current = Account.find_by_username(params['username'].value)
        else
          Account.find(:all, :order => 'username').each do |a|
            say "#{a.id}. #{a}"
          end
          new_current = ask 'Change current account to (enter number): ' do |q|
            q.validate = /\d+/
          end
        end
        
        begin
          current = Account.set_current(new_current)
          say "#{current} is now the current account.\n"
        rescue ActiveRecord::RecordNotFound
          say "ERROR: Account could not be found. Try again. \n"
        end
      end
    end