Authenticate Users - Kotlin SDK

val app: App = App.create(YOUR_APP_ID) // Replace this with your App ID
runBlocking { // use runBlocking sparingly -- it can delay UI interactions
    val user = app.login(Credentials.anonymous())
}

runBlocking {
    // Logs in with anonymous user
    val anonUser = app.login(Credentials.anonymous())
    // Creates a new anonymous user
    val otherAnonUser =
        app.login(Credentials.anonymous(reuseExisting = false))
}

val app: App = App.create(YOUR_APP_ID) // Replace this with your App ID
runBlocking { // use runBlocking sparingly -- it can delay UI interactions
    val user = app.login(Credentials.emailPassword(email, password))
}

val app: App = App.create(YOUR_APP_ID) // Replace this with your App ID
runBlocking { // use runBlocking sparingly -- it can delay UI interactions
    val user = app.login(Credentials.jwt(jwtToken))
}

val app: App = App.create(YOUR_APP_ID) // Replace this with your App ID
runBlocking { // use runBlocking sparingly -- it can delay UI interactions
    val user = app.login(Credentials.apiKey(key))
}

val customCredentials = Credentials.customFunction(
    payload = mapOf("username" to "bob")
)
// Pass the generated credential to app.login()
val currentUser = app.login(customCredentials)

fun loginWithGoogle() {
    val gso = GoogleSignInOptions
        .Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
        .requestIdToken("YOUR WEB APPLICATION CLIENT ID FOR GOOGLE AUTH")
        .build()
    val googleSignInClient = GoogleSignIn.getClient(activity, gso)
    val signInIntent: Intent = googleSignInClient.signInIntent
    val resultLauncher: ActivityResultLauncher<Intent> =
        // Note: this activity MUST inherit from ComponentActivity or AppCompatActivity to use this API
        registerForActivityResult(ActivityResultContracts.StartActivityForResult())
        { result ->
            val task: Task<GoogleSignInAccount> =
                GoogleSignIn.getSignedInAccountFromIntent(result.data)
            handleSignInResult(task)
        }
    resultLauncher.launch(signInIntent)
}
fun handleSignInResult(completedTask: Task<GoogleSignInAccount>) {
    try {
        if (completedTask.isSuccessful) {
            val account: GoogleSignInAccount? = completedTask.getResult(ApiException::class.java)
            val token: String = account?.idToken!!
            val app: App = App.create(YOUR_APP_ID) // Replace this with your App ID
            runBlocking {
                val user = app.login(Credentials.google(token, GoogleAuthType.ID_TOKEN))
            }
        } else {
            Log.e("AUTH", "Google Auth failed: ${completedTask.exception}")
        }
    } catch (e: ApiException) {
        Log.e("AUTH", "Failed to authenticate using Google OAuth: " + e.message);
    }
}

val app: App = App.create(YOUR_APP_ID) // Replace this with your App ID
FacebookSdk.setApplicationId(YOUR_FACEBOOK_SDK_APP_ID)
FacebookSdk.sdkInitialize(activity)
val callbackManager = CallbackManager.Factory.create()
LoginManager.getInstance().registerCallback(
    callbackManager,
    object : FacebookCallback<LoginResult> {
        override fun onSuccess(loginResult: LoginResult) {
            // Signed in successfully, forward credentials to MongoDB Realm.
            val accessToken = loginResult.accessToken
            runBlocking {
                val user = app.login(Credentials.facebook(accessToken.token))
            }
        }
        override fun onCancel() {
            Log.v("AUTH", "Cancelled Facebook login")
        }
        override fun onError(exception: FacebookException) {
            Log.e("AUTH", "Failed to authenticate with Facebook: ${exception.message}")
        }
    })

val app: App = App.create(YOUR_APP_ID) // Replace this with your App ID
runBlocking { // use runBlocking sparingly -- it can delay UI interactions
    val user = app.login(Credentials.apple(idToken))
}