Fix sorting in user feed

internal/handlers/user_handler.go

@@ -771,7 +771,7 @@ func (handler *UserHandler) RetrieveUserPosts(w http.ResponseWriter, r *http.Req
 	}
 
 	// Retrieve posts from database
-	queryString := "SELECT p.post_id, p.content, p.created_at FROM alpha_schema.posts p JOIN alpha_schema.users u on p.author_id = u.user_id WHERE u.username = $1 ORDER BY p.created_at"
+	queryString := "SELECT p.post_id, p.content, p.created_at FROM alpha_schema.posts p JOIN alpha_schema.users u on p.author_id = u.user_id WHERE u.username = $1 ORDER BY p.created_at DESC"
 	rows, err := handler.DatabaseManager.GetPool().Query(ctx, queryString, username)
 	if err != nil {
 		utils.WriteAndLogError(w, schemas.DatabaseError, http.StatusInternalServerError, err)