You only need to do this once. In future sessions you simply login using your email address.
HuygensTest.m
java -jar "huygensClient.jar" myemail@mydomain
where myemail@mydomain is the email address you registered with.
If using Matlab execute the command:
HuygensTest('myemail@mydomain');
This command sends a probe to the server. If result printed is
-0.7087569174052979 you're up and running!