fix: resolved issue when user profile does not exist (#30760)

fix: resolved issue when user profile does not exist

lms/djangoapps/discussion/rest_api/api.py

@@ -3,7 +3,6 @@ Discussion API internal interface
 """
 from __future__ import annotations
 
-import logging
 import itertools
 from collections import defaultdict
 from enum import Enum
@@ -104,7 +103,6 @@ from .utils import (
 )
 
 User = get_user_model()
-log = logging.getLogger(__name__)
 
 ThreadType = Literal["discussion", "question"]
 ViewType = Literal["unread", "unanswered"]
@@ -614,12 +612,10 @@ def _get_users(discussion_entity_type, discussion_entity, username_profile_dict)
     """
     users = {}
     if discussion_entity['author']:
-        try:
-            users[discussion_entity['author']] = _user_profile(username_profile_dict[discussion_entity['author']])
-        except ValueError as value_error:
-            log.error(f'User Profile do not exists for Author :{discussion_entity["author"]} '
-                      f'profiles list: {username_profile_dict.keys()} ')
-            raise value_error
+        user_profile = username_profile_dict.get(discussion_entity['author'])
+        if user_profile:
+            users[discussion_entity['author']] = _user_profile(user_profile)
+
     if (
         discussion_entity_type == DiscussionEntity.comment
         and discussion_entity['endorsed']