iOS – Sign in with Device

Cotter's Passwordless SDK authenticates your user using the FIDO protocol. It allows a seamless, fast, and secure way for your user to login to your iOS App. Authenticate your users in 4 simple steps:

Sign in with Device
In this guide we'll allow users to Sign In with Device using Cotter's SDK. 
Step 1: Import Cotter as a dependency
Head to https://dev.cotter.app/rules and allow Trusted Devices in the dashboard. 
We use Cocoapods as our SDK host. Add pod 'Cotter' to your podfile then run pod install.
Step 2: Initialize Cotter
In your app's AppDelegate.swift, initialize Cotter with your API keys.
import Cotter // IMPORTANT: IMPORT COTTER AS DEPENDENCY
...
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
  Cotter.configureWithLaunchOptions(
    launchOptions: launchOptions,
    apiSecretKey: <your-secret-key>,
    apiKeyID: <your-api-id>
  )
}
Step 3: Register your user
To register, simply call the following function anywhere in your app. Make sure you do import Cotter at the start of the swift file.
Passwordless.shared.register( 
  identifier: <user-email>
)
Step 4: Logging in
When a user logs in, call the following function in your view controller
Passwordless.shared.parentVC = self
Passwordless.shared.login(
  identifier: <user-email>, 
  cb: { (token: CotterOAuthToken?, err:Error?) in
    if err != nil {
        // case 1: handle error as necessary
    }
    if token == nil {
        // case 2: user is unauthorized
    }
    // case 3: user is authorized
})
Then you can handle 3 cases mentioned in the comments in any way you like.
👉 Next steps
That's it! You have successfully build a seamless, fast, and secure login mechanism with Cotter.
Integrate Cotter's push notification services
Push Notification
Verify User's Email or Phone Number
Sign In with Email/Phone Number
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