input: Write a function to store and query user data in a JSON file. The function should include two functionalities: one to store the user data in a JSON file, and another to retrieve the user data from the JSON file. Use the following user_data as an example and ensure that the data can be correctly stored and retrieved. The function names should be 'store_user_data' and 'get_user_data' respectively.
  assert store_user_data({"Name": "John", "Age": 25, "City": "New York"})==None
  assert get_user_data()=={"Name": "John", "Age": 25, "City": "New York"}
output: def store_user_data(user_data):
      with open('user_data.json', 'w') as file:
          json.dump(user_data, file)
  
  def get_user_data():
      with open('user_data.json', 'r') as file:
          return json.load(file)