# Authentication

## Setup

There is a setup call that you need to do before registration or login. You can get your [APP\_ID](https://dashboard.kommunicate.io/settings/install) by signing up on [Kommunicate dashboard](https://dashboard.kommunicate.io/). In your `AppDelegate`, first import `Kommunicate`:

```
import Kommunicate
```

Then, in the `application:didFinishLaunchingWithOptions:` method, setup `Kommunicate` as shown below

`Kommunicate.setup(applicationId:)`

#### In case of 'no such module' error, check the following troubleshooting intsruction:

Once you complete the pod installation, close the project and open `.xcworkspace` file then build the project to avoid the above mentioned error.

## Registration/Login

Convenient methods are present in Kommunicate class to register a user on Kommunicate.

Currently we support two different types of users on our iOS SDK:

### 1. Visitors

A random Id will be assigned as an `userId` if you don't have any information about the users. So first get the userId for an anonymous user as described below and, pass the same in [user registration](https://docs.kommunicate.io/docs/ios-authentication#register-user).

```
let userId = Kommunicate.randomId()
```

Note: The above line should be passed in the registration process.

You don't have to store this id on your side. In the [user registration](https://docs.kommunicate.io/docs/ios-authentication#register-user) section, we show how to check if the user is already logged in.

### 2. Pre chat Lead Collection

For collecting user contact information before initiating the chat, show the Pre chat view like this:

```
let preChatVC = KMPreChatFormViewController(configuration: Kommunicate.defaultConfiguration)
preChatVC.delegate = self 
self.present(preChatVC, animated: false, completion: nil) 
```

![Pre chat view screenshot](https://user-images.githubusercontent.com/5956714/52269368-deebb080-2963-11e9-8221-ccd355d65dc1.png)

Confirm your `ViewController` to the `KMPreChatFormViewControllerDelegate` to get the callbacks when a user taps the submit or close button:

```
extension ViewController: KMPreChatFormViewControllerDelegate {

    func userSubmittedResponse(name: String, email: String, phoneNumber: String) {
        self.dismiss(animated: false, completion: nil)
        
        
        
    }

    func closeButtonTapped() {
        self.dismiss(animated: false, completion: nil)
    }
}
```

### 3. Registered User

If the user is logged in your app then you can pass the user information in this way.

```

let userId = unique key>
let emailId =  
```

### Register User

To register a user to the Kommunicate server, use below method from `Kommunicate` class:

Create a KMUser object and pass it to the `registerUser` method:

```
let kmUser = KMUser()
kmUser.userId = userId
kmUser.displayName = displayName
kmUser.email = emailId // Optional
kmUser.applicationId = 

// Use this same API for login
Kommunicate.registerUser(kmUser, completion: {
    response, error in
    guard error == nil else {return}
    print("Success")
})
```

### Passing on additional details as metadata

Sometimes, you may need to pass additional details for the user apart from the already existing properties of KMUser. You can pass the additional details in metadata of the KMUser object.

```
// This is example data. You can set it according to the additional details you want to add
let userMetadata = NSMutableDictionary()
userMetadata["department"] = "Engineering"
userMetadata["designation"] = "Software Engineer"
userMetadata["team"] = "Device Team"

kmUser.metadata = userMetadata
```

To check if user is already logged in, use below API:

```
if Kommunicate.isLoggedIn {
  // User is already logged in
}
```

Note: To avoid calling in registration everytime use `isLoggedIn` to check if the user is already logged in or not.

### What Next?

1. Check out the [Conversation Section](https://docs.flexmoney.uk/documentation/docs/conversation-2) where you will get the details for creating and launching a conversation.
2. [Enable Push Notifications](https://docs.flexmoney.uk/documentation/docs/push-notification-1) to get real-time updates.