import json


def load_json_file(path_to_json_file: str) -> str:
    """
    Return json as string from selected file.

    Args:
        path_to_json_file: (str) path to file with json
    Returns:
        File content as string (str)
    """
    with open(path_to_json_file) as json_file:
        data = json.load(json_file)
        return json.dumps(data)