consistent in return statements

Car.py

@@ -85,11 +85,13 @@ class Cars(list):
         for car in self:
             if car.vin == vin:
                 return car
+        return None
 
     def get_car_by_id(self, vehicle_id) -> Car:
         for car in self:
             if car.vehicle_id == vehicle_id:
                 return car
+        return None
 
     def add(self, car: Car):
         if self.get_car_by_id(car.vehicle_id) is None:

utils.py

@@ -23,7 +23,6 @@ def get_temp(latitude:str, longitude:str, api_key:str) -> float:
     except KeyError:
         logger.error("Unable to get temperature from openweathermap :%s", traceback.format_exc())
 
-
 def rate_limit(limit, every):
     def limit_decorator(fn):
         semaphore = Semaphore(limit)