title: Project does not exists or it does not contain an Active Cloud DataStore
body: <p>I have an application on Google Cloud Platform that uses FireStore as the Database. </p>
  
  <p>I am getting this error when trying to insert records on FireStore.</p>
  
  <pre><code>google.api_core.exceptions.NotFound: 404 The project "book-shop-c73ec" does not
  exist or it does not contain an active Cloud Datastore database. Please visit ht
  tp://console.cloud.google.com to create a project or https://console.cloud.googl
  e.com/datastore/setup?project="book-shop-c73ec" to add a Cloud Datastore databas
  e. Note that Cloud Datastore always has an associated App Engine app and this ap
  p must not be disabled.
  </code></pre>
  
  <p>This is the sample code I am using.</p>
  
  <pre><code>from google.cloud import firestore
  
  # Add a new document
  db = firestore.Client()
  doc_ref = db.collection(u'users').document(u'alovelace')
  doc_ref.set({
      u'first': u'Ada',
      u'last': u'Lovelace',
      u'born': 1815
  })
  
  # Then query for documents
  users_ref = db.collection(u'users')
  docs = users_ref.get()
  
  for doc in docs:
      print(u'{} =&gt; {}'.format(doc.id, doc.to_dict()))
  </code></pre>
  
  <p>My application is enabled on app engine :</p>
  
  <p><a href="https://i.stack.imgur.com/vzivw.png" rel="noreferrer"><img src="https://i.stack.imgur.com/vzivw.png" alt="enter image description here"></a></p>
  
  <p>And when I go to the DataStore Tab, I am pointed to FireStore. </p>
  
  <p><a href="https://i.stack.imgur.com/OFQs1.png" rel="noreferrer"><img src="https://i.stack.imgur.com/OFQs1.png" alt="enter image description here"></a></p>
  
  <p>Did I miss any step here? </p>
  
  <p>Found this <a href="https://stackoverflow.com/questions/36560659/google-cloud-datastore-api-cannot-find-project-when-app-engine-application-is-di">link</a>, but its just suggesting to enable the app on app engine, which I already did.</p>