title: Node.js - ssh2-sftp-client getting multiple files error
body: <p>I use ssh2-sftp-client to get some files. If I use sftp.end(); at the end I get this error in the console:</p>
  
  <pre><code>{ Error: fastGet-&gt;exists-&gt;exists: No SFTP connection available
      at Object.formatError (/home/project/node_modules/ssh2-sftp-client/src/utils.js:62:18)
      at SftpClient.fastGet (/home/project/node_modules/ssh2-sftp-client/src/index.js:590:19)
      at process._tickCallback (internal/process/next_tick.js:68:7) code: 'ERR_NOT_CONNECTED', custom: true } 'Error'
  
  ...
  </code></pre>
  
  <p>What am I missing?</p>