refactor naming in db, add user delete, update todo

wsServer.go

@@ -86,7 +86,7 @@ func WsSendToGroup(ctx context.Context, groupId uint32, senderId uint32, message
 	sender, err := CacheGetUserById(senderId)
 	if err != nil {
 		sender = &User{Id: senderId}
-		err = DbSetUserById(ctx, sender)
+		err = DbUserSetById(ctx, sender)
 		if err != nil {
 			return errors.New("non existing sender")
 		}
@@ -138,7 +138,7 @@ func handleUnauthenticatedMessage(ctx context.Context, user *User, userMessage *
 	userFromCache, err := CacheGetUserById(userId)
 	if err != nil {
 		dbUser := &User{Id: userId}
-		err = DbSetUserByIdWithoutGroups(ctx, dbUser)
+		err = DbUserSetByIdWithoutGroups(ctx, dbUser)
 		if err != nil {
 			var msg = map[string]any{
 				"from":  "server",
@@ -147,7 +147,7 @@ func handleUnauthenticatedMessage(ctx context.Context, user *User, userMessage *
 			sendMessageCloseIfTimeout(user, &msg)
 			return false
 		}
-		err = DbSetUserGroups(ctx, dbUser)
+		err = DbUserSetGroups(ctx, dbUser)
 		if err != nil {
 			var msg = map[string]any{
 				"from":  "server",
@@ -169,7 +169,7 @@ func handleUnauthenticatedMessage(ctx context.Context, user *User, userMessage *
 		if err != nil {
 			dbGroup := &Group{Id: groupId}
 
-			err = DbSetGroupById(ctx, dbGroup)
+			err = DbGroupSetById(ctx, dbGroup)
 			if err != nil {
 				var msg = map[string]any{
 					"from":  "server",