title: username regex pattern
body: <p>This is my content</p>
  <pre><code>user(s): user-abc
  test: data-1
  </code></pre>
  <p>I have tried the following regex to match user(s) but it appears to match both user(s) and test.</p>
  <pre><code>[A-Za-z_-][A-Za-z0-9_-]
  </code></pre>
  <p>The outcome should be:
  <code>user-abc</code></p>