removes leading slash from token url

CodeChallenge/api/vote.py

@@ -142,7 +142,7 @@ def vote_cast(answer_id: int):
  msg = Message(subject="Vote Confirmation",
  body="Click the following link to confirm "
  " your vote. You may only vote once. "
- f"\n\n{current_app.config['EXTERNAL_URL']}/vote-confirmation?token={tok}",
+ f"\n\n{current_app.config['EXTERNAL_URL']}vote-confirmation?token={tok}",
  recipients=[v.voter_email])
 
  if current_app.config.get("TESTING", False):