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GCM Unauthentication issue

December 3, 2014 1.2k views

I am using python-gcm package to implement push notification. All the things work correctly in my local server. However, when I deploy to DigitalOcean, this does not work, and return GCMAuthenticationException.
I am pretty sure that I am using the correct API key in my server code, and the IP I am using to whitelist in the GCM service for that key is exactly
I have no idea why this happen. I followed exactly what this link says

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