title: Can not find connectors in Confluent control center
body: <p>I am learning kafka with Confluent Platform. I have followed their quick start guide with docker. But when i was try to generate mock data for the topic i could not find connectors as in their guide. Then i spend days to try add connectors with  confluent hub client. I have downloaded the <code>tar.gz</code> file and extract it. As their documentation, path for <code>/bin</code> folder which contains <code>confluent-hub</code> file to path variables. Then i use <code>confluent-hub install confluentinc/kafka-connect-datagen:0.1.1</code> command. But it showed following error.</p>
  
  <pre><code>/c/Program Files/Docker Toolbox/bin/confluent-hub: line 13: cd: /c
  Files
  Toolbox/bin/../share/java: No such file or directory
  Error: Could not find or load main class io.confluent.connect.hub.cli.ConfluentHubClient
  </code></pre>
  
  <p>Furthermore, i am using docker toolkit which installed in my windows machine.
  Can someone help me to solve this problem.</p>
  
  <p>Thank you very much in advance!!! </p>