# Identifiers

> Provides information about the current game and its Player session through unique identifiers.

## Definition

* **Type:** Class
* **Namespace:** [UnityEngine.Identifiers](/engine/6000.3/script-reference/unityengine/identifiers.md)
* **Assembly:** UnityEngine.IdentifiersModule

```csharp
public static class Identifiers
```

## Remarks

For example, you can use this information to tie diagnostic information to a Player session.

## Static Properties

| Property                                                                                                | Description                                                                                                             |
| ------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------- |
| [installationId](/engine/6000.3/script-reference/unityengine/identifiers/identifiers/installationid.md) | Returns the installation ID for this Unity game.                                                                        |
| [userId](/engine/6000.3/script-reference/unityengine/identifiers/identifiers/userid.md)                 | Gets or sets a user identifier supplied by the developer, typically the player's id in a third-party identity provider. |

## Static Events

| Member                                                                                                | Description                       |
| ----------------------------------------------------------------------------------------------------- | --------------------------------- |
| [userIdChanged](/engine/6000.3/script-reference/unityengine/identifiers/identifiers/useridchanged.md) | Raised when userId changes value. |