RemixIconEx.User.user

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

user(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.User.user()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M4 22a8 8 0 1 1 16 0h-2a6 6 0 1 0-12 0H4zm8-9c-3.315 0-6-2.685-6-6s2.685-6 6-6 6 2.685 6 6-2.685 6-6 6zm0-2c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4z" />
</svg>

example usage

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