1 files changed, 14 insertions, 9 deletions
diff --git a/accounts/backend/user/__init__.py b/accounts/backend/user/__init__.py
index e72302a..1504e41 100644
--- a/accounts/backend/user/__init__.py
+++ b/accounts/backend/user/__init__.py
@@ -1,5 +1,8 @@
 # -*- coding: utf-8 -*-
 
+from accounts.app import AccountsFlask
+from accounts.models import Account
+
 
 class NoSuchUserError(ValueError):
     pass
@@ -49,7 +52,9 @@ class Backend(object):
       >> backend.find_by_uid('test*', wildcard=True) # find with wildcards
     """
 
-    def __init__(self, app):
+    app: AccountsFlask
+
+    def __init__(self, app: AccountsFlask) -> None:
         self.app = app
 
         #: Exception type, that is raised if no matching user was found.
@@ -60,14 +65,14 @@ class Backend(object):
         #: could also be raised, if you want to change user information.
         self.InvalidPasswordError = InvalidPasswordError
 
-    def auth(self, username, password):
+    def auth(self, username: str, password: str):
         """
         Tries to authenticate a user with a given password. If the
         authentication is successful an Account object will be returned.
         """
         raise NotImplementedError()
 
-    def get_by_uid(self, uid):
+    def get_by_uid(self, uid: str) -> Account:
         """
         Find a single user by uid. Unlike find_by_uid, don't return a list but
         raise NoSuchUserError if there is no such user.
@@ -80,7 +85,7 @@ class Backend(object):
 
         return users[0]
 
-    def get_by_mail(self, mail):
+    def get_by_mail(self, mail: str) -> Account:
         """
         Find a single user by mail. Unlike find_by_mail, don't return a list but
         raise NoSuchUserError if there is no such user.
@@ -93,19 +98,19 @@ class Backend(object):
 
         return users[0]
 
-    def find_by_uid(self, uid, wildcard=False):
+    def find_by_uid(self, uid: str, wildcard=False) -> list[Account]:
         return self.find({'uid': uid}, wildcard)
 
-    def find_by_mail(self, mail, wildcard=False):
+    def find_by_mail(self, mail: str, wildcard=False) -> list[Account]:
         return self.find({'mail': mail}, wildcard)
 
-    def find(self, filters=None, wildcard=False):
+    def find(self, filters=None, wildcard=False) -> list[Account]:
         """
         Find accounts by a given filter.
         """
         raise NotImplementedError()
 
-    def register(self, account):
+    def register(self, account: Account):
         """
         Register a new user account.
 
@@ -118,7 +123,7 @@ class Backend(object):
         account.uidNumber = self._get_next_uidNumber()
         self._store(account)
 
-    def update(self, account, as_admin=False):
+    def update(self, account: Account, as_admin=False):
         """
         Updates account information like passwords or email.
         """