How to access a user's Gmail account from a web application?
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I am building a CRM webapp in PHP that will pull from all of a user's email and social media accounts, and allow them to read and respond to all their emails, or compose new ones.  Right now, I am just trying to get this working with Gmail using OAuth 1.0, but I'm having some trouble.

I can get the request token and the authorize token successfully and once the user authorizes me, Google redirects back to my app like it's supposed to... but now how do I actually pull messages from the user's inbox?  This link: https://sites.google.com/site/oauthgoog/Home/oauthimap says I need to make a call using the user's email to get access to their inbox, but how do I get the user's email address?  What do I do with the oauth_verifier and oauth_token that Google returns to me?

Thanks in advance!