Retrieve the `Config` in `fpath`.

def get(cls, fpath=None, create_missing=True):
        "Retrieve the `Config` in `fpath`."
        fpath = _expand_path(fpath or cls.DEFAULT_CONFIG_PATH)
        if not fpath.exists() and create_missing: cls.create(fpath)
        assert fpath.exists(), f'Could not find config at: {fpath}. Please create'
        with open(fpath, 'r') as yaml_file: return yaml.safe_load(yaml_file)