add post userbook

needed a refactor to check the id in db during dto validation

internal/routes/bookuserget.go

@@ -7,14 +7,14 @@ import (
 	"git.artlef.fr/PersonalLibraryManager/internal/dto"
 	"git.artlef.fr/PersonalLibraryManager/internal/mapper"
 	"git.artlef.fr/PersonalLibraryManager/internal/model"
-	"github.com/gin-gonic/gin"
+	"git.artlef.fr/PersonalLibraryManager/internal/myvalidator"
 )
 
 func GetMyBooksHanderl(ac appcontext.AppContext) {
 	var userbooks []model.UserBook
 	user, err := ac.GetAuthenticatedUser()
 	if err != nil {
-		ac.C.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
 		return
 	}
 	ac.Db.Preload("Book").Where("user_id = ?", user.ID).Find(&userbooks)