Update elixir_auth_google.ex

tested in prod. its working.

Author: fabricedge

lib/elixir_auth_google.ex

@@ -25,12 +25,12 @@ defmodule ElixirAuthGoogle do
   @doc """
   `get_baseurl_from_conn/1` derives the base URL from the conn struct
   """
-   @spec get_baseurl_from_conn(conn) :: String.t()
+  @spec get_baseurl_from_conn(conn) :: String.t()
   def get_baseurl_from_conn(%{host: h, port: p, scheme: s}) do
-    if p != p do
-     "#{Atom.to_string(s)}://#{h}"
-       else
-     "#{Atom.to_string(s)}://#{h}:#{p}"
+    cond do
+      p == 443 -> "#{Atom.to_string(s)}://#{h}"
+      p == 80 -> "#{Atom.to_string(s)}://#{h}"
+      true -> "#{Atom.to_string(s)}://#{h}:#{p}"
     end
   end