UserService.getCurrentUser() is not working for me

Hi there:

I am a beginner of GWT.

The problem I am having is I couldn't get Google account
authentication. I simply added UserService.getCurrentUser() to the
default project trying to return the user name trough RPC call but it
didn't work. I tried upload the project to GAE and the result is the
same.

Anyone knows why this is happening?

Thanks,.

Xi Zhang

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