public async Task GetKundenTest()
        {
            KundeAllDto result = _target.GetAll(new Empty());
            RepeatedField <KundeDto> kundeDtos = result.Clients;

            Assert.Equal(4, kundeDtos.Count);
        }
        public override async Task <KundeAllDto> GetAll(Empty request, ServerCallContext context)
        {
            List <KundeDto> temp = await ClientManager.GetAll().ConvertToDtos();

            KundeAllDto result = new KundeAllDto();

            temp.ForEach(kundeDto => result.Clients.Add(kundeDto));
            return(result);
        }