feat(order): Add finalize order functionality

src/allmende_payment_system/api/dependencies.py

@@ -41,4 +41,4 @@ async def get_user_object(request: Request, session: SessionDep) -> User:
     return user
 
 
-UserDep = Annotated[dict, Depends(get_user_object)]
+UserDep = Annotated[User, Depends(get_user_object)]

src/allmende_payment_system/api/shop.py

@@ -34,18 +34,18 @@ async def get_cart(request: Request, session: SessionDep, user: UserDep):
 
 
 @shop_router.get("/shop/finalize_order")
-async def get_cart(request: Request, session: SessionDep, user: UserDep):
+async def finalize_order(request: Request, session: SessionDep, user: UserDep):
 
     cart = user.shopping_cart
 
     # TODO: Implement
-    cart.finalize_order()
+    cart.finalize(user.accounts[0])
 
     return RedirectResponse(url=f"/", status_code=status.HTTP_302_FOUND)
 
 
 @shop_router.get("/shop/area/{area_id}")
-async def get_shop(request: Request, session: SessionDep, area_id: int):
+async def get_shop_area(request: Request, session: SessionDep, area_id: int):
     query = select(Area).where(Area.id == area_id)
     area = session.scalars(query).one()
     return templates.TemplateResponse(