models: initialize plugins there

authentic2/models.py

@@ -21,8 +21,9 @@ except ImportError:
 from django.contrib.contenttypes.models import ContentType
 
 
-from . import managers
+from . import managers, plugins
 
+plugins.init()
 
 class UserManager(BaseUserManager):
     def create_user(self, username, email=None, password=None, **extra_fields):

authentic2/plugins.py

@@ -126,3 +126,8 @@ def register_plugins_idp_backends(idp_backends,
                 if cls not in idp_backends:
                     idp_backends.append(cls)
     return tuple(idp_backends)
+
+def init():
+    for plugin in get_plugins():
+        if hasattr(plugin, 'init'):
+            plugin.init()