public IActionResult GetContact_WithCard(string contact_IdentityCardNum)
 {
     try
     {
         if (contact_IdentityCardNum == null)                                  //If the Identity Card Number is not specified...
         {
             return(Ok(ContactsRepo.GetAllContactsWithCards()));               //Return all contacts...
         }
         return(Ok(ContactsRepo.GetContactWithCard(contact_IdentityCardNum))); //Return specific contact...
     }
     catch (Exception e)
     {
         return(StatusCode(500, _config["StatusCodesText:ServerErr"]));
     }
 }