title: Cannot authenticate to Google Document AI
body: <p>I am trying to use Google Document AI for Invoices from our application provider. I have created a Project (which works with Google Vision AI), a Storage Bucket, a Service Account (and gotten a JSON key file), a Processor, but when I go to authenticate I get the following message:</p>
  <pre><code>Error while trying to connect to the Google DocumentAI Engine. PERMISSION DENIED: Permission 'documentai.processors.processOnline' denied on resource '//documentai.googleapis.com/projects/savvy-container-300718/locations/null/processors/32a7eaa085f61a3b' (or it may not exist).
  </code></pre>
  <p>Any ideas on why I am getting this error?</p>