Raise JIRAError when no user found (#1383)

raise error if no user found

Author: lishoujun

jira/client.py

@@ -1803,6 +1803,9 @@ def _get_user_id(self, user: Optional[str]) -> Optional[str]:
             else:
                 users = self.search_users(user=user, maxResults=20)
 
+            if len(users) < 1:
+                raise JIRAError(f"No matching user found for: '{user}'")
+
             matches = []
             if len(users) > 1:
                 matches = [u for u in users if self._get_user_identifier(u) == user]