code: func (c *Config) Unset(key string) error {
  	data, err := load(c.filename, c.passphrase)
  	if err != nil {
  		return errors.Wrapf(err, "failed to read secrects config %s: %s", c.filename, err)
  	}
  
  	_, found := data[key]
  	if !found {
  		return nil
  	}
  
  	delete(data, key)
  	return save(c.filename, c.passphrase, data)
  }
docs: // Unset removes the key from the storage