RemixIconEx.User.user_4

You're seeing just the function user_4, go back to RemixIconEx.User module for more information.
Link to this function

user_4(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.User.user_4()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M5 20h14v2H5v-2zm7-2a8 8 0 1 1 0-16 8 8 0 0 1 0 16zm0-2a6 6 0 1 0 0-12 6 6 0 0 0 0 12z" />
</svg>

example usage

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