func (c *Config) Get(section string, key string) string {
	value, ok := c.config[section][key]
	if !ok {
		return ""
	}
	return value
}
func (c *Config) Get(section string, key string) string {
	value, ok := c.config[section][key]
	if !ok {
		return ""
	}
	return value
}
// Get function returns the value of a key in the configuration. If the key
// does not exist, it returns empty string (i.e., "").