# Frequently Used Functions
1. After successfully installing iDos Games SDK, copy the **Login** and **Main** scenes to your project folder and set the **Login scene first** and **Main scene second**.
2. The **Login** and **Main scenes** already contain all the scripts and components to ensure everything works out of the box. The **Login scene** is where the player registers or logs in, and then transitions to the **Main scene**.
3. You can simply hide unnecessary functionality from the SDK from the **UI in the Main Canvas**.
## Rewards
Any good game needs to **reward players** for specific actions or rewards. The SDK includes ready-made functionality for implementing rewards, you can view them by clicking the **"Reward" button**.
## **ClaimRewardSystem**
If you are writing your own reward implementation, you can use the **ClaimRewardSystem** class in your code.
#### ClaimCoinReward
```
// Player reward in Coins (soft currency) and event points
int coinReward = 1000;
int eventPoint = 1;
ClaimRewardSystem.ClaimCoinReward(coinReward, eventPoint)
```
#### ClaimTokenReward (VIP)
```
// Player reward in Tokens (hard currency) and event points. Players who have VIP status can call.
int tokenReward = 100;
int eventPoint = 1;
ClaimRewardSystem.ClaimTokenReward(tokenReward, eventPoint)
```
#### ClaimSkinProfit (VIP)
```
// Player receive rewards in tokens if they wear skins that generate income in tokens. VIP only
ClaimRewardSystem.ClaimSkinProfit()
```
## UserInventory
In this class, you can get data about the user's inventory. How many items, currency, spins, and chests the user has.
```
// Get the number of items by itemID (string)
int itemAmount = UserInventory.GetItemAmount(itemID);
// Get the amount of currency by VirtualCurrencyID
int currencyAmount = UserInventory.GetVirtualCurrencyAmount(VirtualCurrencyID.CO);
// Get the number of tickets by SpinTicketType
int ticketAmount = UserInventory.GetSpinTicketAmount(SpinTicketType.Standard);
// Get the number of key fragments based on ChestKeyFragmentType. To open the chest, you need to collect all 3 key fragments.
int commonKey1 = UserInventory.GetChestKeyFragmentAmount(ChestKeyFragmentType.Common_1);
// Get a bool value indicating whether the user is a VIP.
bool isVip = UserInventory.HasVIPStatus
// etc.
```
## UserDataService and IGSUserData
All player data is retrieved and processed in these classes. You can **retrieve data** such as **inventory**, **currencies**, and **other player data**.
```
// Returns the player's inventory
IGSUserData.UserInventory
// Returns player currencies
IGSUserData.Currency
// etc.
```
#### Saving Player Data
If you need to implement saving of custom player data, then use the following methods.
```
// Saving data by key
UserDataService.UpdateCustomUserData("Key1", "Key Value");
// Getting data by key
string value = UserDataService.GetCachedCustomUserData("Key1");
```
---
# Agent Instructions: Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter:
```
GET https://docs.idosgames.com/start/frequently-used-functions.md?ask=
```
The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.