Added the option management, and moved the configuration of the default currency, the default account for the income and expenses log, and the recurring expenses and incomes to the options.

src/accounting/utils/user.py

@@ -50,6 +50,15 @@ class UserUtilityInterface(t.Generic[T], ABC):
             data, or False otherwise.
         """
 
+    @abstractmethod
+    def can_admin(self) -> bool:
+        """Returns whether the currently logged-in user can administrate the
+        accounting settings.
+
+        :return: True if the currently logged-in user can administrate the
+            accounting settings, or False otherwise.
+        """
+
     @property
     @abstractmethod
     def cls(self) -> t.Type[T]: