Since Google lists the ClientLogin API as deprecated what is the recommended alternative? In my case I need a server to authenticate and post things using credentials which I ow
The authentication method varies based on the scenario of your application. The scenarios reported by Google documentation are:
In your case, the Web Server Application scenario might be useful (if you give more details about what do you mean for "In my case I need a server to authenticate" I can be more precise about this point).
However, the recommended alternative to ClientLogin is OAuth2.