public override async Task <AutoDto> InsertAuto(AutoDto request, ServerCallContext context)
        {
            try
            {
                var entity   = request.ConvertToEntity();
                var response = await _manager.AddEntity(entity);

                return(response.ConvertToDto());
            }
            catch (Exception)
            {
                throw new RpcException(new Status(StatusCode.Internal, "Internal error occured."));
            }
        }
        public async Task addAutoTest()
        {
            // arrange
            Auto auto = new LuxusklasseAuto {
                Marke = "Mercedes", Tagestarif = 200
            };

            // act
            await _target.AddEntity <Auto>(auto);

            // assert
            Auto testAuto = _target.GetByPrimaryKey(5).Result;

            Assert.True("Mercedes" == testAuto.Marke, "It should be Mercedes and not: " + testAuto.Marke);
        }