def token!(authorization_code,opts = {})
      opts[:redirect_uri] ||= DEFAULT_REDIRECT_URI
      self.access_token = oauth_client.auth_code.get_token(authorization_code, redirect_uri: opts[:redirect_uri])
    end
def token!(authorization_code,opts = {})
      opts[:redirect_uri] ||= DEFAULT_REDIRECT_URI
      self.access_token = oauth_client.auth_code.get_token(authorization_code, redirect_uri: opts[:redirect_uri])
    end
=begin rdoc
OAuth get_token method

This method will get #access_token (OAuth2::AccessToken) ... and save in Baidu instance

== Params:

* authorization_code - Authorization Code in callback URL
* opts
  * +redirect_uri+ String - default Baidu::DEFAULT_REDIRECT_URI,URL with logined redirect back
=end