在使用ursMqttPaha插件时，如何建立安全认证方式的连接，即：服务器地址+端口+用户名和密码+crt认证文件，以这种方式怎么编程，请指导一下。
How to establish a secure authentication connection when using the ursMqttPaha plugin, that is, server address+port+username and password+CRT authentication file? Please guide how to program in this way.
注：使用免费的MQTT地址broker.emqx.io，是可以连接，但使用安全认证的方式，未能连接成功，不知道是插件本身无法满足，还是编程语句不对。
Note: It is possible to connect using the free MQTT address broker. emqx.io, but the connection was not successful using secure authentication. It is unknown whether this is due to the plugin itself being unable to meet the requirements or if the programming statement is incorrect.
