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Using paired Google accounts as your Android app login...

How to publish Android application with different accounts...

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Storing data on a user's Google's account...

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Google Oauth crossdomain.xml problem with Flex...

Connect a webapp to Google account...

How do I NOT require user's email when using Rails Omniauth gem and Google OpenID...

Which App Engine Authentication Method should I choose? (Pros/Cons)...

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Howto use Google Accounts as login...

PHP OpenID doesn't work with Google/Yahoo and 'hacks' fix it... are they safe?...

Emailed key validation for user registration...

Google Apps Account to be used instead of Google Account for GAE application with a UserProperty...