impementing autocomplete with nest elasticsearch

Question

i am using nest version 7.17 in .net core and completion suggester this is my code below

   [HttpGet("[action]")]
    public async Task<IActionResult> AutoComplete(string query)
    {
        var result1 = _elasticClient.Search<Product>(p => p
        .Index(nameof(Product).ToLowerInvariant())
                .Suggest(ss => ss
                    .Completion("my-term-suggest", t => t
                        .Field(p => p.Title)
                        .Prefix(query)
                        .Fuzzy(f => f.Fuzziness(Fuzziness.Auto))
                    )
                )
            );
        //return Ok(result1.Suggest["my-term-suggest"].ToList());
        
        return Ok(result1.Documents.ToList());

    }

and this is index model

   public class Product
{

    public int Id { get; set; }
    [Completion]
    public string Title { get; set; }
    public string Description { get; set; }
    public int Price { get; set; }
    public int Quantity { get; set; }
}

after executing the AutoComplete Action i cant see any result could any one tell what am i mistake? any help will be highly appreciated