title: Unable to login to Docker on Ubuntu 18 using credential store
body: <p>I can't login to docker using <code>docker login</code>.</p>
  
  <p>I'm executing:</p>
  
  <pre><code>sudo docker login --username USERNAME --password PASSWORD
  </code></pre>
  
  <p>I'm getting the following error:</p>
  
  <pre><code>Error saving credentials: error storing credentials - err: exec: 
  "docker-credential-pass": executable file not found in $PATH, out: ``
  </code></pre>
  
  <p>I tried to search for a similar errors, but didn't really find anything relevant. </p>
  
  <p>I'm using:</p>
  
  <p>Ubuntu 18.10.</p>
  
  <p>Docker version 18.06.0-ce, build 0ffa825.</p>
  
  <p>Why is this happening?</p>