code: func (c *Config) SetConfigValue(mount, key, value string) error {
  	if mount == "" {
  		if err := c.Root.SetConfigValue(key, value); err != nil {
  			return err
  		}
  		return c.Save()
  	}
  
  	if sc, found := c.Mounts[mount]; found {
  		if err := sc.SetConfigValue(key, value); err != nil {
  			return err
  		}
  	}
  	return c.Save()
  }
docs: // SetConfigValue will try to set the given key to the value in the config struct