public async Task <IActionResult> DeleteStudentWithID(int studentID)
        {
            if (Validation.IsAnyInputObjectDataNotSpecified(new List <object> {
                studentID
            }))
            {
                return(BadRequest("Error: student ID must be specified (with non-zero value)"));
            }

            using (var connection = new SqlConnection(Configuration.GetConnectionString("DefaultConnection")))
            {
                try
                {
                    connection.Open();

                    var numberOfAffectedRows = await StudentsRepository.DeleteStudentAsync(connection, studentID);

                    if (numberOfAffectedRows == 0)
                    {
                        return(NotFound("Student with such id isn't found in database"));
                    }
                }
                catch (Exception ex)
                {
                    return(BadRequest(ex.Message));
                }
            }

            return(NoContent());
        }