initial: ZeroTier-like P2P mesh VPN server with multi-tenant Web UI

internal/service/user.go

@@ -0,0 +1,25 @@
+package service
+
+import (
+	"zeromesh/internal/database"
+)
+
+type UserService struct {
+	db *database.DB
+}
+
+func NewUserService(db *database.DB) *UserService {
+	return &UserService{db: db}
+}
+
+func (s *UserService) Count() (int64, error) {
+	var count int64
+	err := s.db.Model(&struct{}{}).Table("users").Count(&count).Error
+	return count, err
+}
+
+func (s *UserService) List(offset, limit int) ([]map[string]interface{}, error) {
+	var users []map[string]interface{}
+	err := s.db.Table("users").Offset(offset).Limit(limit).Order("id desc").Find(&users).Error
+	return users, err
+}