Adds error throw for LoginActivity LoginMode Unknown

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/auth/registration/DefaultRegistrationWizard.kt

@@ -67,9 +67,11 @@ internal class DefaultRegistrationWizard(
         return performRegistrationRequest(params, LoginType.PASSWORD)
     }
 
-    override suspend fun createAccount(userName: String?,
+    override suspend fun createAccount(
+        userName: String?,
         password: String?,
-                                       initialDeviceDisplayName: String?): RegistrationResult {
+        initialDeviceDisplayName: String?
+    ): RegistrationResult {
         val params = RegistrationParams(
             username = userName,
             password = password,

vector/src/main/java/im/vector/app/features/login/LoginActivity.kt

@@ -252,7 +252,7 @@ open class LoginActivity : VectorBaseActivity<ActivityLoginBinding>(), UnlockedA
             SignMode.SignIn -> {
                 // It depends on the LoginMode
                 when (state.loginMode) {
-                    LoginMode.Unknown,
+                    LoginMode.Unknown -> error("Developer error")
                     is LoginMode.Sso -> launchSsoFlow()
                     is LoginMode.SsoAndPassword,
                     LoginMode.Password -> addFragmentToBackstack(views.loginFragmentContainer,