public void Initialize()
 {
     _userInsuranceService = Substitute.For <IUserInsuranceService>();
     _userInsuranceService.FindUserInsurance(Arg.Is <string>(x => x == "User1"))
     .Returns(Task.FromResult((IEnumerable <Insurance>) new List <Insurance>()
     {
         new Insurance {
             Id = "1"
         }
     })
              );
 }
        public async Task <IEnumerable <Insurance> > FindUserInsurance(string user)
        {
            var userInsurance = await _userInsuranceService.FindUserInsurance(user);

            return(userInsurance);
        }