implement google oauth

lib/entendu/user_from_auth.ex

@@ -66,11 +66,26 @@ defmodule Entendu.UserFromAuth do
     end
   end
 
-  def can_access?(recipient, %{emails: emails, username: username}),
+  def can_access?(recipient, %{emails: emails, username: username} = stuff),
     do: email_matches?(recipient, emails) || username_matches?(recipient, username)
 
   defp email_matches?(recipient, emails),
-    do: emails |> Enum.any?(&(&1["verified"] == true and &1["email"] == recipient))
+    do:
+      emails
+      |> Enum.filter(&only_verified_emails/1)
+      |> Enum.map(&retrieve_email/1)
+      |> Enum.any?(&(&1 == recipient))
+
+  # Github lists unverified emails and need to be filtered out
+  defp only_verified_emails(%{"verified" => is_verified}), do: is_verified
+
+  defp only_verified_emails(_), do: true
+
+  defp retrieve_email(%{"email" => email}), do: email
+
+  defp retrieve_email(email), do: email
+
+  defp username_matches?(_recipient, nil), do: false
 
   defp username_matches?(recipient, username), do: String.trim(username) === recipient
 end