[BE] feature/nickname 랜덤 닉네임에 고정 문자열 대신 카카오 닉네임 사용 #94

All 224 tests pass in 10s

  55 files ±0   55 suites ±0 10s ⏱️ -1s
224 tests ±0 224 ✔️ ±0 0 💤 ±0 0 ❌ ±0
235 runs ±0 235 ✔️ ±0 0 💤 ±0 0 ❌ ±0

Results for commit dd2bd7e. ± Comparison against earlier commit b51510f.