RemixIconEx.System.lock_password

You're seeing just the function lock_password, go back to RemixIconEx.System module for more information.
Link to this function

lock_password(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.System.lock_password()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M18 8h2a1 1 0 0 1 1 1v12a1 1 0 0 1-1 1H4a1 1 0 0 1-1-1V9a1 1 0 0 1 1-1h2V7a6 6 0 1 1 12 0v1zM5 10v10h14V10H5zm6 4h2v2h-2v-2zm-4 0h2v2H7v-2zm8 0h2v2h-2v-2zm1-6V7a4 4 0 1 0-8 0v1h8z" />
</svg>

example usage

svg.icon {
  width: 96;
  height: 96;
}