public IActionResult Get()
 {
     try
     {
         return(Ok(_interestedCustomer.GetAllInterestedCustomers()));
     }
     catch (Exception)
     {
         return(StatusCode(500));
     }
 }
        public void TestShowAllInterestedCustomers()
        {
            var productList = _interestedCustomer.GetAllInterestedCustomers();

            Assert.True(productList.Any());
        }