# Flutter (Beta)

## Initialize the SDK

Before using the SDK, you need to initialize the SDK with your API key. Please find your account API key in the [social.plus Console.](https://portal.amity.co/login)

After logging in Console:

1. Click **Settings** to expand the menu.
2. Select **Security**.
3. On the **Security** page, you can find the API key in the **Keys** section.

![API key in Security page](https://2352509137-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MX0mOAVWkotGme0iRzu%2Fuploads%2FHByfbC7jAPzokdKTvOz4%2Fapikey.png?alt=media\&token=305f0efa-d526-421a-bc84-aba4b0a1ae8b)

{% embed url="<https://gist.github.com/amythee/7fe9f404dcdc6d16fe9cf9caafd11f6c#file-amityinitializer-dart>" %}

#### Specify Endpoints Manually (Optional)

You can specify endpoints manually via optional parameters. API endpoints for each data center are different so you need to adjust the endpoint accordingly.

We currently support multi-data center capabilities for the following regions:

|     Region    |           Endpoint           |   Endpoint URL  |
| :-----------: | :--------------------------: | :-------------: |
|     Europe    | AmityRegionalHttpEndpoint.EU | api.eu.amity.co |
|   Singapore   | AmityRegionalHttpEndpoint.SG | api.sg.amity.co |
| United States | AmityRegionalHttpEndpoint.US | api.us.amity.co |

## Authentication

You must first register the current device with a `userId`. A device registered with a `userId` will be permanently tied to that `userId` until you deliberately unregister the device, or until the device has been inactive for more than 90 days. A device registered with a specific `userId` will receive all messages belonging to that user.

{% embed url="<https://gist.github.com/amythee/4a3d37b5e164655802bdd2c646f9d44a#file-amityauthentication-dart>" %}