-Added init for injecting client id and authority into the intent

-Removed adding flat ussername as it's not yet merged into MSAL so build fails
-update to attributeName as that's the correct value

Author: spetrescu84

app/src/main/java/com/azuresamples/msalnativeauthandroidkotlinsampleapp/AuthClient.kt

@@ -6,27 +6,47 @@ import android.util.Log
 import com.microsoft.identity.client.Logger
 import com.microsoft.identity.client.PublicClientApplication
 import com.microsoft.identity.nativeauth.INativeAuthPublicClientApplication
+import com.microsoft.identity.nativeauth.NativeAuthPublicClientApplicationParameters
 
 object AuthClient : Application() {
     private lateinit var authClient: INativeAuthPublicClientApplication
 
+    const val EXTRA_CLIENT_ID = "native_auth_client_id"
+    const val EXTRA_AUTHORITY_URL = "native_auth_authority_url"
+
     @JvmStatic
     fun getAuthClient(): INativeAuthPublicClientApplication {
         return authClient
     }
 
+    // Initialize the auth client with the provided clientId and authorityUrl, or with the default config file if they are not provided.
     @JvmStatic
-    fun initialize(context: Context) {
+    fun initialize(context: Context, clientId: String? = null, authorityUrl: String? = null) {
         Logger.getInstance().setExternalLogger { tag, logLevel, message, containsPII ->
             Log.e(
                 "MSAL",
                 "$tag $logLevel $message"
             )
         }
 
-        authClient = PublicClientApplication.createNativeAuthPublicClientApplication(
-            context,
-            R.raw.auth_config_native_auth
-        )
+        // If clientId and authorityUrl are provided, create the auth client with the provided values. Otherwise, create the auth client with the default config file.
+        if (clientId != null && authorityUrl != null) {
+            val parameters = NativeAuthPublicClientApplicationParameters(
+                clientId = clientId,
+                authorityUrl = authorityUrl,
+                challengeTypes = listOf("oob", "password")
+            )
+            parameters.capabilities = listOf("mfa_required", "registration_required")
+
+            authClient = PublicClientApplication.createNativeAuthPublicClientApplication(
+                context,
+                parameters
+            )
+        } else {
+            authClient = PublicClientApplication.createNativeAuthPublicClientApplication(
+                context,
+                R.raw.auth_config_native_auth
+            )
+        }
     }
 }

app/src/main/java/com/azuresamples/msalnativeauthandroidkotlinsampleapp/MainActivity.kt

@@ -18,7 +18,9 @@ class MainActivity : AppCompatActivity() {
         val binding = ActivityMainBinding.inflate(layoutInflater)
         setContentView(binding.root)
 
-        AuthClient.initialize(this@MainActivity)
+        val clientId = intent.getStringExtra(AuthClient.EXTRA_CLIENT_ID)
+        val authorityUrl = intent.getStringExtra(AuthClient.EXTRA_AUTHORITY_URL)
+        AuthClient.initialize(this@MainActivity, clientId, authorityUrl)
 
         val emailSignInSignUpFragment = EmailSignInSignUpFragment()
         val emailPasswordSignInSignUpFragment = EmailPasswordSignInSignUpFragment()

app/src/main/java/com/azuresamples/msalnativeauthandroidkotlinsampleapp/SignUpAttributesFragment.kt

@@ -56,10 +56,8 @@ class SignUpAttributesFragment : Fragment() {
 
     private fun submitAttributes() {
         CoroutineScope(Dispatchers.Main).launch {
-            val username = binding.usernameText.text.toString()
 
             val attributes = UserAttributes.Builder()
-                .flatUsername(username)
                 .build()
 
             val actionResult = currentState.submitAttributes(attributes)

app/src/main/java/com/azuresamples/msalnativeauthandroidkotlinsampleapp/SignUpCodeFragment.kt

@@ -72,7 +72,7 @@ class SignUpCodeFragment : Fragment() {
                 is SignUpResult.AttributesRequired -> {
                     // Custom implementation for Flat Username / Alias
                     if (actionResult.requiredAttributes.size == 1 &&
-                        actionResult.requiredAttributes.any { it.name == "flatusername" }
+                        actionResult.requiredAttributes.any { it.attributeName == "flatusername" }
                     ) {
                         navigateToAttributes(
                             nextState = actionResult.nextState