Using fastapi create an api for a service that provide weather information for cities in Saudi Arabia . Make sure the api is CRUD .
- User is able to view all the cities with the weather temperature for each city.
- User is able to request the weather temperature for a specific city.
- User is able to add a new city with weather temperature.
- User is able update the weather temperature for a spcicif city.
- User is able to delete a city .