input: Write a python function to convert a JSON object into a dictionary.
  assert convert_json_to_dict('{"name": "John", "age": 30, "City": "New York"}') == {"name": "John", "age": 30, "City": "New York"}
  assert convert_json_to_dict('{"fruit": "Apple", "size": "Large", "color": "Red"}') == {"fruit": "Apple", "size": "Large", "color": "Red"}
  assert convert_json_to_dict('{"brand": "Toyota", "model": "Corolla", "year": 2020}') == {"brand": "Toyota", "model": "Corolla", "year": 2020}
output: import json
  
  def convert_json_to_dict(json_str):
      return json.loads(json_str)