code: def parse_config_file(config_file):
    
    expanded_config_file_path = os.path.expanduser(config_file)
    if not os.path.lexists(expanded_config_file_path):
      return None
  
    configs = {}
    # Read the configuration file
    with open(expanded_config_file_path, 'r') as f:
      configs = yaml.load(f)
  
    return configs
docs: This will parse the config file for the tracker
    :return: the config or None if the file is not found