use ;
/**
* Checks if the JWT token is still valid based on its expiration time.
*
* # Arguments
* * `jwt_expiration` - The expiration time of the JWT token as a Unix timestamp in seconds.
*
* # Returns
* * `Ok(true)` if the token is still valid (not expired).
* * `Ok(false)` if the token has expired.
* * `Err(String)` if there was an error retrieving the current system time.
*/