# User Data

### User Class

The User class handles interactions user logins and logoffs.

### Syntax

### Member Details

#### AddUser Field

> For subscribing to events for users entering the scene
>
> #### Syntax
>
> public static readonly [string](http://www.go-mono.com/docs/monodoc.ashx?link=T:System.String) **AddUser**
>
> #### Remarks
>
> #### Requirements
>
> **Namespace:** Sansar.Simulation\
> **Assembly:** Sansar.Simulation (in Sansar.Simulation.dll)\
> **Assembly Versions:** 1.1.0.0
>
> ***

#### RemoveUser Field

> For subscribing to events for users leaving the scene
>
> #### Syntax
>
> public static readonly [string](http://www.go-mono.com/docs/monodoc.ashx?link=T:System.String) **RemoveUser**
>
> #### Remarks
>
> #### Requirements
>
> **Namespace:** Sansar.Simulation\
> **Assembly:** Sansar.Simulation (in Sansar.Simulation.dll)\
> **Assembly Versions:** 1.1.0.0
>
> ***

#### Subscribe Method

> Subscribes to User Events.
>
> #### Syntax
>
> \[Sansar.Script.Interface]\
> \[System.Obsolete("Use subscription callbacks of type Action\<Sansar.Simulation.UserData>", false)]\
> public [void](http://www.go-mono.com/docs/monodoc.ashx?link=T:System.Void) **Subscribe** ([string](http://www.go-mono.com/docs/monodoc.ashx?link=T:System.String) Action, [User.SubscriptionHandler](https://help.sansar.com/hc/en-us/articles/115003454726) callback, [bool](http://www.go-mono.com/docs/monodoc.ashx?link=T:System.Boolean) persistent)
>
> **Parameters**
>
> > *Action*
> >
> > string action of the event: AddUser, RemoveUser
> >
> > *callback*
> >
> > Callback which is executed when the event completes.
> >
> > *persistent*
> >
> > Optional, set to false to unsubscribe after one event.
>
> #### Remarks
>
> #### Requirements
>
> **Namespace:** Sansar.Simulation\
> **Assembly:** Sansar.Simulation (in Sansar.Simulation.dll)\
> **Assembly Versions:** 1.1.0.0
>
> ***

#### Subscribe Method

> Subscribes to User Events.
>
> #### Syntax
>
> **See Also**
>
> **Parameters**
>
> > *Action*
> >
> > string action of the event: AddUser, RemoveUser
> >
> > *callback*
> >
> > Callback which is executed when the event completes.
> >
> > *persistent*
> >
> > Optional, set to false to unsubscribe after one event.
>
> **Returns**
>
> > An [Sansar.Script.IEventSubscription](https://docs.sansar.com/latest/script-api-docs/sansar-script-namespace/ievent-subscription) that can be used to cancel the subscription.
>
> #### Remarks
>
> #### Requirements
>
> **Namespace:** Sansar.Simulation\
> **Assembly:** Sansar.Simulation (in Sansar.Simulation.dll)\
> **Assembly Versions:** 1.1.0.0
>
> ***

#### Subscribe Method

> Subscribes to User Events.
>
> #### Syntax
>
> **Parameters**
>
> > *Action*
> >
> > string action of the event: AddUser, RemoveUser
> >
> > *User*
> >
> > Sansar.Script.SessionId for the user.
> >
> > *callback*
> >
> > Callback which is executed when the event completes.
> >
> > *persistent*
> >
> > Optional, set to false to unsubscribe after one event.
>
> #### Remarks
>
> #### Requirements
>
> **Namespace:** Sansar.Simulation\
> **Assembly:** Sansar.Simulation (in Sansar.Simulation.dll)\
> **Assembly Versions:** 1.1.0.0
>
> ***

#### Subscribe Method

> Subscribes to User Events.
>
> #### Syntax
>
> **See Also**
>
> **Parameters**
>
> > *Action*
> >
> > string action of the event: AddUser, RemoveUser
> >
> > *User*
> >
> > Sansar.Script.SessionId for the user.
> >
> > *callback*
> >
> > Callback which is executed when the event completes.
> >
> > *persistent*
> >
> > Optional, set to false to unsubscribe after one event.
>
> **Returns**
>
> > An [Sansar.Script.IEventSubscription](https://docs.sansar.com/latest/script-api-docs/sansar-script-namespace/ievent-subscription) that can be used to cancel the subscription.
>
> #### Remarks
>
> #### Requirements
>
> **Namespace:** Sansar.Simulation\
> **Assembly:** Sansar.Simulation (in Sansar.Simulation.dll)\
> **Assembly Versions:** 1.1.0.0
>
> ***

### User.SubscriptionHandler Delegate

Subscribe to receive events when users enter or leave the experience, or change their chat name.

### Syntax

\[Sansar.Script.Interface]\
\[System.Obsolete("Use subscription callbacks of type Action\<Sansar.Simulation.UserData>", false)]\
public delegate [void](http://www.go-mono.com/docs/monodoc.ashx?link=T:System.Void) **User.SubscriptionHandler** ([string](http://www.go-mono.com/docs/monodoc.ashx?link=T:System.String) Action, [Sansar.Script.SessionId](https://help.sansar.com/hc/en-us/articles/115003551808) User, [string](http://www.go-mono.com/docs/monodoc.ashx?link=T:System.String) Data)

**Parameters**

> *Action*
>
> string action of the event: AddUser, RemoveUser
>
> *User*
>
> Sansar.Script.SessionId for the user.
>
> *Data*
>
> Deprecated.

### Remarks

### Requirements

**Namespace:** Sansar.Simulation\
**Assembly:** Sansar.Simulation (in Sansar.Simulation.dll)\
**Assembly Versions:** 1.1.0.0

### UserData Class

Subscribe to receive events when users enter or leave the experience.

### Syntax

### Member Details

#### Action Property

> string action of the event: AddUser, RemoveUser
>
> #### Syntax
>
> \[get: Sansar.Script.Interface]\
> public [string](http://www.go-mono.com/docs/monodoc.ashx?link=T:System.String) **Action** { get; }
>
> **Value**
>
> #### Remarks
>
> #### Requirements
>
> **Namespace:** Sansar.Simulation\
> **Assembly:** Sansar.Simulation (in Sansar.Simulation.dll)\
> **Assembly Versions:** 1.1.0.0
>
> ***

#### Data Property

> Deprecated.
>
> #### Syntax
>
> \[get: Sansar.Script.Interface]\
> public [string](http://www.go-mono.com/docs/monodoc.ashx?link=T:System.String) **Data** { get; }
>
> **Value**
>
> #### Remarks
>
> #### Requirements
>
> **Namespace:** Sansar.Simulation\
> **Assembly:** Sansar.Simulation (in Sansar.Simulation.dll)\
> **Assembly Versions:** 1.1.0.0
>
> ***

#### ToString Method

> A string representation of this object.
>
> #### Syntax
>
> \[Sansar.Script.Interface]\
> public override [string](http://www.go-mono.com/docs/monodoc.ashx?link=T:System.String) **ToString** ()
>
> **Returns**
>
> > A string representation of this object.
>
> #### Remarks
>
> #### Requirements
>
> **Namespace:** Sansar.Simulation\
> **Assembly:** Sansar.Simulation (in Sansar.Simulation.dll)\
> **Assembly Versions:** 1.1.0.0
>
> ***

#### User Property

> Sansar.Script.SessionId for the user.
>
> #### Syntax
>
> **Value**
>
> #### Remarks
>
> #### Requirements
>
> **Namespace:** Sansar.Simulation\
> **Assembly:** Sansar.Simulation (in Sansar.Simulation.dll)\
> **Assembly Versions:** 1.1.0.0
>
> ***