netcup no browser but need google authenticate
however google authentication need borwser

steps:
 VPS (mini mac) with browser create a ssh tunnetl wait for google auth and send CODE back
 headless netcup send 127.0.0.1:port to VPS and get CODE

VPS goto somewhere with browser and ssh to create TUNNEL
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ssh -N -L 4321:127.0.0.1:4321 -p 8080 account@netcup.ifong.cc
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headless server (without browser)
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 https://accounts.google.com/o/oauth2/auth?client_id=xxxxx
 receive CODE
 process and goto next stage
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