title: MS teams bot - create new conversation
body: <p>I'm using the botbuilder-python to build MS Teams bot.
  Following samples I am able to respond to messages. What I'm struggling with is creating completely new message, without existing activity passed from Teams. I modified some code from the tests (<a href="https://github.com/Microsoft/botbuilder-python/blob/62b0512a4dd918fa0d3837207012b31213aaedcc/libraries/botframework-connector/tests/test_conversations.py" rel="nofollow noreferrer">https://github.com/Microsoft/botbuilder-python/blob/62b0512a4dd918fa0d3837207012b31213aaedcc/libraries/botframework-connector/tests/test_conversations.py</a>) but I'm getting:</p>
  
  <p>botbuilder.schema.error_response_py3.ErrorResponseException: (BadSyntax) Could not parse tenant id</p>
  
  <p>What is it, where can I find it (I can fish it out from request but it's not ideal) and how do I pass it? Can anyone point me at any Python samples of creating a new conversation?</p>