lib/chatterbot/dsl.rb
def token(s)
      bot.deprecated "Setting access_token outside of your config file is deprecated!", Kernel.caller.first
      bot.config[:access_token] = s
    end
def token(s)
      bot.deprecated "Setting access_token outside of your config file is deprecated!", Kernel.caller.first
      bot.config[:access_token] = s
    end
set the token
 @param s [String] the token