ArenaNet Forum Chat for September: The next forum conversation, on the topic of our September 18th release -- including Living World Season 4 Episode 4, a new raid, a new legendary, and more -- invites member questions and comments from Tuesday (9/25) through Friday afternoon Pacific Time (9/28). Devs will be responding through early October, as their schedules allow. Join the special September 2018 AFC Subforum to take part. More info here.
I have a question, but I do not think it is possible.
But the question is: Is it possible to get a user through his unique account name his GUID without his access key? The reason for this is because you can not rely on his unique account name because it can change.