title: Navigate is not defined in react native
body: <p>I have some question about my code, I want to navigate to the createMeetup screen by using following code, but it has error.</p>
  
  <p><a href="https://i.stack.imgur.com/LqQNr.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/LqQNr.png" alt="enter image description here"></a></p>
  
  <p>Error like this:</p>
  
  <p><a href="https://i.stack.imgur.com/OvgQW.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/OvgQW.png" alt="enter image description here"></a></p>
  
  <p>and this is my navigator:</p>
  
  <p><a href="https://i.stack.imgur.com/xDYDa.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xDYDa.png" alt="enter image description here"></a></p>
  
  <p>Need help, many thanks!</p>