Move some code around and improve validation (#128)

custom_components/auth_oidc/endpoints/__init__.py

@@ -0,0 +1,7 @@
+"""Imports manager"""
+
+from .callback import OIDCCallbackView as OIDCCallbackView
+from .finish import OIDCFinishView as OIDCFinishView
+from .injected_auth_page import OIDCInjectedAuthPage as OIDCInjectedAuthPage
+from .redirect import OIDCRedirectView as OIDCRedirectView
+from .welcome import OIDCWelcomeView as OIDCWelcomeView