Ignore *.pyc-files for git

.gitignore

@@ -1 +1,2 @@
 /.env
+*.pyc

ki/auth.py

@@ -5,41 +5,28 @@ from app import app, db
 from ki.models import User, Token
 
 
-class UserWrongCredentialsException(Exception):
-    pass
-
-
-class UserAllreadyLoggedInException(Exception):
-    pass
-
-
 def auth(username, password):
     auth_file_path = app.config["KI_DATA_DIR"] + "/auth.yml"
 
     with open(auth_file_path, "r") as auth_file_stream:
+        users = yaml.safe_load(auth_file_stream)
 
-        try:
-            users = yaml.safe_load(auth_file_stream)
-
-        except yaml.YAMLError:
-            print('Could not parse auth.yml.')
-
-        try:
-            auth_user = users[username]
-
-            if auth_user["password"] != password:
-                raise UserWrongCredentialsException
-
-        except (UserWrongCredentialsException, KeyError):
-            print('Wrong username/password combination')
+        if username not in users:
             return None
 
-        else:
-            user = User.query.filter(User.auth_id.__eq__(username)).first()
+        auth_user = users[username]
 
-            token = Token(token=str(uuid.uuid4()), user=user)
+        if auth_user["password"] != password:
+            return None
 
-            db.session.add(token)
-            db.session.commit()
+        user = User.query.filter(User.auth_id.__eq__(username)).first()
 
-            return token
+        if user is None:
+            user = User(auth_id=username)
+            db.session.add(user)
+
+        token = Token(token=str(uuid.uuid4()), user=user)
+        db.session.add(token)
+        db.session.commit()
+
+    return token