How to connect with my vm’s vnc from browser

I can see my vnc url is
http://sunstone:9869/vnc?host=sunstone&port=29876&token=wstalmylo7kzouq7f9n&encrypt=no&title=vmname
&password=null

I want to connect with my vm’s vnc from browser with the url
I notice the token(i can get ), but when i open the url ,The browser prompts me to enter a username password.
how to open url with no enter username and password ?