Configure linters.

Introduce flake8 and mypy for better error checking.
Fix all errors and warnings emitted by those.
Also fix type error with `url_for`.

1 files changed, 4 insertions, 4 deletions

diff --git a/mu4web/user/__init__.py b/mu4web/user/__init__.py
index 1ecc49f..bb14f67 100644
--- a/mu4web/user/__init__.py
+++ b/mu4web/user/__init__.py
@@ -3,16 +3,16 @@ class User:
         self._username = username
         self._authenticated = False
 
-    def is_authenticated(self):
+    def is_authenticated(self) -> bool:
         return self._authenticated
 
-    def is_active(self):
+    def is_active(self) -> bool:
         return True
 
-    def is_anonymous(self):
+    def is_anonymous(self) -> bool:
         return False
 
-    def get_id(self):
+    def get_id(self) -> str:
         return self._username
 
     def validate(self, _: str) -> bool: