refactor: command가 Nickname객체를 가지게 변경 #259

All 308 tests pass in 26s

64 files ±0 64 suites ±0 26s ⏱️ ±0s
308 tests ±0 308 ✅ ±0 0 💤 ±0 0 ❌ ±0
434 runs ±0 434 ✅ ±0 0 💤 ±0 0 ❌ ±0

Results for commit 70c3577. ± Comparison against earlier commit 92e555a.