title: Onesignal notification template, Tags are not working
body: <p>The same code without the tags (in the payload) succeeds with default template values, when adding the tags the message is getting 200-ok but on the onesignal dashboard - messages -delivery page i see  NO RECIPIENTS status.
  what am i doing wrong ?</p>
  
  <pre><code>import json
  import requests
  headers = {'Authorization': 'Basic mykey', 
      'Content-Type': 'application/json'}
  payload = {'app_id': 'myapp_id',
      'include_player_ids': ['my_player_id'],
      'tags': [{'key': 'full_name', 'relation': '=', 'value': 'MOSHOE'}],
      'template_id': 'my_template id'}
  req = requests.post('ONESIGNAL_URL',headers=headers,data=json.dumps(payload))
  </code></pre>