public async Task <GoalResponse> AddGoal(Guid userId, GoalRequest request)
{
var challenge = _mappingService.CreateChallenge(request);
var goal = _mappingService.CreateGoal(userId, challenge.ChallengeId, request);
_challengeRepo.Create(challenge);
_goalRepo.Create(goal);
await _goalRepo.Save();
return(new GoalResponse(goal));
}