Fix crash on invalid username.

1 files changed, 3 insertions, 1 deletions

diff --git a/mu4web/password.py b/mu4web/password.py
index ff0df21..2b4aaa0 100755
--- a/mu4web/password.py
+++ b/mu4web/password.py
@@ -82,7 +82,9 @@ class Passwords:
     def validate(self, username: str, password: str) -> bool:
         """Check if user exists, and if it has a correct password."""
         # These shall fail when key is missing
-        data = self.db[username]
+        data = self.db.get(username)
+        if not data:
+            return False
         proc = hash_methods[data['method']]
         digest = proc((data['salt'] + password).encode('UTF-8')).hexdigest()
         return data['hash'] == digest