# Get User Information

In the social.plus SDK, a user is represented by an `AmityUser` object, which contains the user's unique `userId` and `displayName`. The `userId` is an immutable value that is assigned to a user when their account is created, and cannot be changed afterwards. This value serves as a unique identifier for the user within the SDK, and is used to perform actions such as sending messages or creating connections between users.

To retrieve an `AmityUser` object for a specific `userId`, you can use the `getUser` method provided by the `UserRepository`. This method accepts the `userId` as a parameter and returns a [Live Object](https://docs.social.plus/social-plus-sdk/core-concepts/live-objects-collections) of `AmityUser`. The live object allows developers to observe changes to the user's properties in real-time, ensuring that their app remains up-to-date with the latest user information.

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Follow the below code to retrieve a user object:

```javascript
import { UserRepository } from '@amityco/js-sdk';

const liveObject = UserRepository.getUser('userId');
liveObject.on('dataUpdated', user => {
  // user is successfully fetched
});
```

**Get Single User**

The User Repository provides a method to get a single user. It returns a LiveObject which you can observe.

```javascript
userRepo.userForId('user123')
```

You can also use the code below to get one user:

```typescript
let liveUser = UserRepository.getUser("some-user-id")
userObject.on(“dataUpdated”, model => {
   // you can access user object as model here
  console.log(model.userId, model.displayName)
})
```

**Get All Users**

The User Repository provides a method to get a list of all users, which will be returned as a LiveCollection:

```javascript
userRepo.getAllUsers()
```

This method takes an optional `sortBy` parameter which must be a `UserSortingMethod` - these include `displayName`, `firstCreated`, and `lastCreated`:

```javascript
import { UserSortingMethod } from '@amityco/js-sdk'

userRepo.getAllUsers(UserSortingMethod.DisplayName)
```

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To retrieve multiple users, you can use `getUserByIds` method provided by `UserRepository`. This method accepts a collection of `userId` as a parameter and returns a [Live Collection](https://docs.social.plus/social-plus-sdk/core-concepts/live-objects-collections) of`AmityUser`.

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The functionality isn't currently supported by this SDK.
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