def client
      @client ||= ::OAuth2::Client.new(GoogleAPI.client_id, GoogleAPI.client_secret,
        site: 'https://accounts.google.com',
        token_url: '/o/oauth2/token',
        raise_errors: false
      )
    end
def client
      @client ||= ::OAuth2::Client.new(GoogleAPI.client_id, GoogleAPI.client_secret,
        site: 'https://accounts.google.com',
        token_url: '/o/oauth2/token',
        raise_errors: false
      )
    end
Build the OAuth2::Client object to be used when building an AccessToken.