fix: Add user filed to get problem set grades API
#192
| Job | Run time |
|---|---|
| 1m 5s | |
| 1m 7s | |
| 1m 23s | |
| 1m 3s | |
| 1m 10s | |
| 1m 6s | |
| 1m 10s | |
| 1m 5s | |
| 1m 13s | |
| 1m 3s | |
| 1m 7s | |
| 2s | |
| 1m 7s | |
| 1m 6s | |
| 1m 6s | |
| 15m 53s |