How to authorize the google-api-ruby-client?
<p>I'm working to get the google-api-ruby-client gem working following the basic usage example here: Basic usage</p>

<pre><code>require 'google/apis/drive_v2'

Drive = Google::Apis::DriveV2 # Alias the module
drive = Drive::DriveService.new
drive.authorization = ... # See Googleauth or Signet libraries

# Search for files in Drive (first page only)
files = drive.list_files(q: "title contains 'finances'")
files.items.each do |file|
  puts file.title
end
</code></pre>

<p>Where I'm stuck is <code>drive.authorization</code>. I have an authorized token already for the user via the gem omniauth-google-oauth2. How do I use that token with google-api-ruby-client?</p>