Add missing optional methods to Role::Provider pod

Author: SysPete

lib/Dancer2/Plugin/Auth/Extensible/Role/Provider.pm

@@ -130,6 +130,10 @@ provider.
 
 =over
 
+=item * create_user
+
+=item * get_user_by_code
+
 =item * set_user_details
 
 =item * set_user_password

lib/Dancer2/Plugin/Auth/Extensible/Test.pm

@@ -38,7 +38,8 @@ Current valid test names:
 =item * base
 
 This test is always run whether or not it is supplied in C<@test_names>. This
-tests all methods/functions that all providers must provide.
+tests all methods/functions that all providers must provide. See
+L<Dancer2::Plugin::Auth::Extensible::Role::Provider/required methods>.
 
 =item * create_user