RemixIconEx.User.user_6

You're seeing just the function user_6, go back to RemixIconEx.User module for more information.
Link to this function

user_6(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.User.user_6()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M12 17c3.662 0 6.865 1.575 8.607 3.925l-1.842.871C17.347 20.116 14.847 19 12 19c-2.847 0-5.347 1.116-6.765 2.796l-1.841-.872C5.136 18.574 8.338 17 12 17zm0-15a5 5 0 0 1 5 5v3a5 5 0 0 1-4.783 4.995L12 15a5 5 0 0 1-5-5V7a5 5 0 0 1 4.783-4.995L12 2zm0 2a3 3 0 0 0-2.995 2.824L9 7v3a3 3 0 0 0 5.995.176L15 10V7a3 3 0 0 0-3-3z" />
</svg>

example usage

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