HTTP Code: 200
Response:
{"success":true,"message":"로그인 성공","user":{"id":"10","nickname":"Test User","email":"test@test.com","balance":973250,"avatar":"http:\/\/localhost:8000\/upbit\/images\/default_avatar_01.png"},"redirect":"http:\/\/localhost:8000\/upbit\/main.php"}

✓ Login SUCCESS
User ID: 10
Username: N/A
Nickname: Test User
Balance: 973250