RemixIconEx.User.user_3

You're seeing just the function user_3, go back to RemixIconEx.User module for more information.
Link to this function

user_3(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.User.user_3()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M20 22h-2v-2a3 3 0 0 0-3-3H9a3 3 0 0 0-3 3v2H4v-2a5 5 0 0 1 5-5h6a5 5 0 0 1 5 5v2zm-8-9a6 6 0 1 1 0-12 6 6 0 0 1 0 12zm0-2a4 4 0 1 0 0-8 4 4 0 0 0 0 8z" />
</svg>

example usage

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