Update player game credit
Possible Error Codes for this API
| Code | Description |
|---|---|
| 1 | Insufficient credit |
| 2 | Invalid parameter |
| 10 | Duplicate transaction ID |
| 36 | Server error |
| 9999 | Unknown error |
Platform-defined unique request ID, length >= 32 and <= 128 bytes
Platform product ID
User account in game (max 23 characters, lowercase letters and numbers only)
Transaction ID (1-128 characters, ASCII 32-126 printable characters only, ` and ~ not allowed)
Credit change amount (positive for deposit, negative for withdrawal)
md5(username + credit + transaction_id + platform secret key)