setup user/auth repository and service

internal/service/user.go

@@ -0,0 +1,25 @@
+package service
+
+import (
+	"git.juancwu.dev/juancwu/budgething/internal/model"
+	"git.juancwu.dev/juancwu/budgething/internal/repository"
+)
+
+type UserService struct {
+	userRepository repository.UserRepository
+}
+
+func NewUserService(userRepository repository.UserRepository) *UserService {
+	return &UserService{
+		userRepository: userRepository,
+	}
+}
+
+func (s *UserService) ByID(id string) (*model.User, error) {
+	user, err := s.userRepository.ByID(id)
+	if err != nil {
+		return nil, err
+	}
+
+	return user, nil
+}