public async Task Put(int id, [FromBody] ViewModelDiamond diamond)
 {
     var domainDiamond = new DM.Diamond
     {
         Id      = id,
         Name    = diamond.Name,
         Country = diamond.Country
     };
     await _diamondService.UpdateDiamond(domainDiamond);
 }
        public async Task Post([FromBody] ViewModelDiamond diamond)
        {
            var newDiamond = new DM.Diamond
            {
                Name    = diamond.Name,
                Country = diamond.Country
            };

            await _diamondService.AddDiamond(newDiamond);
        }