Merge pull request #39 from WinesProof/main

Fix bug in error message for update_token

schwab_api/schwab.py

@@ -444,7 +444,7 @@ def get_account_info_v2(self):
     def update_token(self, token_type='api'):
         r = self.session.get(f"https://client.schwab.com/api/auth/authorize/scope/{token_type}")
         if not r.ok:
-            raise ValueError("Error updating Bearer token: {r.reason}")
+            raise ValueError(f"Error updating Bearer token: {r.reason}")
         token = json.loads(r.text)['token']
         self.headers['authorization'] = f"Bearer {token}"