Fix jwt.encode return type (#19776) (#19958)

* Fix for issue #19776

PyJWT 2.0.0 does not return `bytes` for `encode()` instead returns `str`. So converted the `str` to `bytes` and returned the resulting value

* added check for jwt.encode return type

* Update __init__.py

* Updated with suggested change

* Test to check return type of get_token() 

The `get_token()` must return a `str` but for PyJWT version < 2.0.0 the `jwt.encode()` returns `bytes`. This test is to make sure if token returned by `get_token()` is `str`.

* Update test_get_token.py

* Update test_get_token.py

* Delete test_get_token.py

Co-authored-by: Willem Melching <willem.melching@gmail.com>

common/api/__init__.py

@@ -27,7 +27,11 @@ class Api():
       'iat': now,
       'exp': now + timedelta(hours=1)
     }
-    return jwt.encode(payload, self.private_key, algorithm='RS256').decode('utf8')
+    token = jwt.encode(payload, self.private_key, algorithm='RS256')
+    if isinstance(token, bytes):
+      token = token.decode('utf8')
+    return token
+    
 
 def api_get(endpoint, method='GET', timeout=None, access_token=None, **params):
   backend = "https://api.commadotai.com/"