title: React JS AWS Cognito error Logins don't match
body: <p>I have a problem with log in. I always get this error: <code>Logins don't match. Please include at least one valid login for this identity or identity pool.</code>
  I have a registered user and confirm him in my pool and everything looks ok.</p>
  
  <p>i use <a href="https://github.com/isotoma/react-cognito" rel="nofollow noreferrer">react-cognito</a> and i think i have all implemented right (by <a href="https://github.com/isotoma/react-cognito-example" rel="nofollow noreferrer">example</a> ) and i have no idea how to fix this issue.
  Can you help me? 
  thank you </p>