Add constructor for User class

This was causing issues where appending to any of the lists would update the class variable rather than the instance variable, leading to everyone having the same likes, tracks, etc.

scrape.py

@@ -48,11 +48,18 @@ class User:
     following_count = None
     follower_count = None
 
-    tracks = []
+    tracks = None
-    likes = []
+    likes = None
 
-    followers = []
+    followers = None
-    following = []
+    following = None
+
+
+    def __init__(self):
+        self.tracks = []
+        self.likes = []
+        self.followers = []
+        self.following = []
 
 class Track:
     url = ''