add user posts view

app/models.py

@@ -50,6 +50,10 @@ class Users(Model):
             WHERE users.id = ?"""
         return db.fetch_one(q, self.id)
 
+    def get_posts(self, per_page: int, page: int) -> list:
+        q = f'{Posts.FULL_POSTS_QUERY} WHERE posts.user_id = ? ORDER BY posts.created_at DESC LIMIT ? OFFSET ?'
+        return db.query(q, self.id, per_page, (page - 1) * per_page)
+
     def get_all_subscriptions(self):
         q = """
             SELECT threads.title AS thread_title, threads.slug AS thread_slug