diff --git a/ckanext/saml2auth/plugin.py b/ckanext/saml2auth/plugin.py
index fa3d93a0..83f703b5 100644
--- a/ckanext/saml2auth/plugin.py
+++ b/ckanext/saml2auth/plugin.py
@@ -42,7 +42,7 @@ class Saml2AuthPlugin(plugins.SingletonPlugin):
     plugins.implements(plugins.IBlueprint)
     plugins.implements(plugins.IConfigurable)
     plugins.implements(plugins.ITemplateHelpers)
-    plugins.implements(plugins.IAuthenticator)
+    plugins.implements(plugins.IAuthenticator, inherit=True)
 
     # ITemplateHelpers
 
@@ -95,12 +95,6 @@ def update_config(self, config_):
 
     # IAuthenticator
 
-    def identify(self):
-        pass
-
-    def login(self):
-        pass
-
     def logout(self):
 
         response = _perform_slo()