fix: missing import, typo

main.py

@@ -1,4 +1,6 @@
 from fastapi import FastAPI
+
+from uuid import uuid4
 import sqlite3
 
 # use database residing here
@@ -31,7 +33,7 @@ async def new_session():
         except sqlite3.IntegrityError as e:
             if i < tries - 1 and str(e) == "UNIQUE constraint failed: sessions.cookie":
                 continue
-            else if str(e) == "UNIQUE constraint failed: sessions.cookie":
+            elif str(e) == "UNIQUE constraint failed: sessions.cookie":
                 return {"cookie": "error"}
             else:
                 raise
@@ -115,7 +117,7 @@ async def rate_picture(cookie: str, picture_id: int, mark: int):
                     """,
             {"imgid": picture_id, "sessionid": sessionid["sessionid"], "mark": mark},
         )
-        cur.commit()
+        con.commit()
     except sqlite3.IntegrityError as e:
         if str(e) == "UNIQUE constraint failed: marks.imgid, marks.sessionid":
             return {"status": "already rated"}