<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def init(dvc_dir):
 """Initializes dvc config. Args: dvc_dir (str):
 path to .dvc directory. Returns: dvc.config.Config: config object. """

        config_file = os.path.join(dvc_dir, Config.CONFIG)
        open(config_file, "w+").close()
        return Config(dvc_dir)