ADD: Subreddit search

dto/post.py

@@ -1,11 +1,18 @@
 class Post:
-    def __init__(self, author, title, content, url, timestamp):
+    def __init__(self, author: str, 
+                 title: str, 
+                 content: str, 
+                 url: str, 
+                 timestamp: float, 
+                 source: str):
         self.author = author
         self.title = title
         self.content = content
         self.url = url
         self.timestamp = timestamp
-
+        self.source = source
+        
         # Optionals
         self.subreddit = None
-        self.upvotes = None
+        self.upvotes = None
+        self.comments = None