# File lib/omniauth/strategies/windows_live/windowslivelogin.rb, line 133
  def appid=(appid)
    if (appid.nil? or appid.empty?)
      return if force_delauth_nonprovisioned
      fatal("Error: appid: Null application ID.") 
    end
    if (not appid =~ /^\w+$/)
      fatal("Error: appid: Application ID must be alpha-numeric: " + appid)
    end
    @appid = appid
  end