> For the complete documentation index, see [llms.txt](https://docs.mitter.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mitter.io/sdks/ios/basic-setup.md).

# Basic Setup

Before you can start communicating with Mitter using the SDK, it needs to be configured with your **application ID** and **user auth token ID**.

The best place to configure a global `Mitter` object is inside your `AppDelegate.swift` file.

Open up the `AppDelegate` file and declare an instance field for the `Mitter` object, like this:

```
var mitter: Mitter = Mitter(applicationId: "")
```

After you’ve done that, locate the function with `didFinishLaunchingWithOptions` signature and initialise your `Mitter` object with your application and user details like this:

```
mitter = Mitter(
            applicationId: "MZzf4-na9nL-O98wq-M1HxS",
            userAuthToken: "eyJhbGciOiJIUzUxMiJ9.eyJpc3MiOiJtaXR0ZXItaW8iLCJ1c2VyVG9rZW5JZCI6IkhYbkZJSXIydUpQRHMzankiLCJ1c2VydG9rZW4iOiJhaHFtNTgzcjRwbzEwZmNqZTllaHE5dDV1NCIsImFwcGxpY2F0aW9uSWQiOiJNWnpmNC1uYTluTC1POTh3cS1NMUh4UyIsInVzZXJJZCI6ImNzckN5LVNKTDN1LThBS01ULVdxdjZ5In0.FTgn0GBgIQrA0NznQEUHyC7SN7rbN9O9cWlI5mejuDG466VSJHjwGWZF2DB3nsn8eoeCg5toIXXh5Sxz2MMU3w"
)
```

The user token is enough to help the SDK figure out the user ID. Therefore, you don’t need to explicitly add the user ID. You can get both these values from the [mitter.io dashboard](https://mitter.io/home).

#### Using the SDK with containerised Mitter.io

If you're using the Mitter.io docker container, then you need to *override* the default API endpoint in the SDK, as follows:

```
mitter = Mitter(
            applicationId: "MZzf4-na9nL-O98wq-M1HxS",
            userAuthToken: "eyJhbGciOiJIUzUxMiJ9.eyJpc3MiOiJtaXR0ZXItaW8iLCJ1c2VyVG9rZW5JZCI6IkhYbkZJSXIydUpQRHMzankiLCJ1c2VydG9rZW4iOiJhaHFtNTgzcjRwbzEwZmNqZTllaHE5dDV1NCIsImFwcGxpY2F0aW9uSWQiOiJNWnpmNC1uYTluTC1POTh3cS1NMUh4UyIsInVzZXJJZCI6ImNzckN5LVNKTDN1LThBS01ULVdxdjZ5In0.FTgn0GBgIQrA0NznQEUHyC7SN7rbN9O9cWlI5mejuDG466VSJHjwGWZF2DB3nsn8eoeCg5toIXXh5Sxz2MMU3w",
            mitterApiEndpoint: "http://localhost:11901"
)
```