Proxies doesn't work

[BirkhoffLee]

birkhoff at Birkhoff-MBPR in ~
$ wt init github@birkhoff.me
We were unable to verify your identity.
Would you like to try again? [Y/n]

And it doesn't work too if I run HTTP_PROXY=https://127.0.0.1:1087 wt init github@birkhoff.me, while I'm pretty sure the proxy servers are working fine. So I had to use Proxifier to make my proxy system-wide, and it's working fine now.

birkhoff at Birkhoff-MBPR in ~
$ wt init github@birkhoff.me

Please enter the verification code we sent to github@birkhoff.me below.
Verification code: 075434
Welcome to webtasks! Create your first one as follows:

$ echo "module.exports = function (cb) { cb(null, 'Hello'); }" > hello.js
$ wt create hello.js