title: Warrant AWS Python Cognito Error: User pool client ******** does not exist
body: <p>I am trying to use the Python library for using AWS Cognito called capless/warrant. Every time I try to instantiate, by using this function:</p>
  
  <pre><code>u = Cognito('your-user-pool-id','your-client-id')
  </code></pre>
  
  <p>(using my user-pool-id and my client-id, I have checked a ton!), I get this error:</p>
  
  <pre><code>An error occurred (ResourceNotFoundException) when calling the SignUp operation: User pool client ********** does not exist.
  </code></pre>
  
  <p>I have tried getting rid of everything in the user pool ID but "us-east-2", but this also doesn't work. Has anyone gotten this or know how to solve it? Thank you!</p>