update naming of functions, add option to get count of unread messages of user

packages/postgresql/postgresql.go

@@ -162,7 +162,7 @@ func GetWholeUser(ctx context.Context, user *types.User) error {
 		return err
 	}
 
-	cache.CacheSaveUser(user)
+	cache.SaveUser(user)
 	return nil
 }