Github account linking

[ajefts]

Issue reported from member:

But I find the reason of my previous issue. my GitHub profile contains no-ASCII code, when decoded jwt which contains my GitHub profile, infomation in js, it will throw a exception.

My GitHub account xxxxx, bio contains a emoji and Chinese characters, and my Github information didn't sync to topcoder profile in last few months.

When I remove Chinese characters and emoji, and re-login via Github, the jwt token saved in the cookie and refresh, the problem is gone on.

Although the issue solved, I really hope TopCoder can fix the problem, because I thinks other members(may be just a few) may aslo face the problem.