implement pool group and user get routes,

improvements to http return codes,
add localdb backend handler

app/utils.go

@@ -1,15 +1,13 @@
 package app
 
 import (
-	"encoding/json"
 	"fmt"
 	"net/http"
-	"os"
 
 	"github.com/gin-contrib/sessions"
 	"github.com/gin-gonic/gin"
 
-	common "user-manager-api/app/common"
+	localdb "user-manager-api/app/localdb"
 	pve "user-manager-api/app/pve"
 )
 
@@ -24,6 +22,7 @@ type UserSession struct {
 		Name    string
 		Handler any
 	}
+	DB *localdb.DB
 }
 
 func GetUserSessionFromContext(c *gin.Context) (*UserSession, int, error) {
@@ -36,27 +35,3 @@ func GetUserSessionFromContext(c *gin.Context) (*UserSession, int, error) {
 	usersession := UserSessions[uuid]
 	return usersession, http.StatusOK, nil
 }
-
-func LoadLocaldb(dbPath string) (map[string]common.User, error) {
-	users := map[string]common.User{}
-	content, err := os.ReadFile(dbPath)
-	if err != nil {
-		//log.Fatal("Error when opening file: ", err)
-		return users, err
-	}
-	err = json.Unmarshal(content, &users)
-	if err != nil {
-		//log.Fatal("Error during Unmarshal(): ", err)
-		return users, err
-	}
-	return users, nil
-}
-
-func SaveLocaldb(configPath string, users map[string]common.User) error {
-	json, err := json.Marshal(users)
-	if err != nil {
-		return err
-	}
-	err = os.WriteFile(configPath, []byte(json), 0644)
-	return err
-}