How to retrieve your UID and server:
Open Goddess of Victory: NIKKE;
Tap your Profile icon in the upper left corner of the main screen;
Your UID (Player ID) will appear under your nickname;
Your Server (such as NA, SEA, KR, JP, or Global) is displayed beside or below your UID.
How to redeem:
Open the official NIKKE Top-Up page;
Choose the Gem or Monthly Pass package you wish to purchase;
Select a payment method;
Enter your UID and select your Server;
Complete the payment;
Wait for the Gems to appear in your account;
If the Gems do not appear immediately, restart the game.