Exception because of a Null nickname

[wrooot]

Running latest code, trying to login with username and password results in:
java.lang.NullPointerException: Nickname must not be null
at org.jivesoftware.smack.util.Objects.requireNonNull(Objects.java:23)
at org.jivesoftware.smackx.muc.MucEnterConfiguration$Builder.(MucEnterConfiguration.java:93)
at org.jivesoftware.smackx.muc.MultiUserChat.getEnterConfigurationBuilder(MultiUserChat.java:407)
at org.jivesoftware.smackx.muc.MultiUserChat.join(MultiUserChat.java:629)
at org.alameyo.flame.controllers.muc.MultiUserChatStanzaListener.(MultiUserChatStanzaListener.kt:14)
at org.alameyo.flame.controllers.muc.MultiUserChatController.(MultiUserChatController.kt:16)
at org.alameyo.flame.views.home.muc.MultiUserChatTab.(MultiUserChatTab.kt:13)
at org.alameyo.flame.controllers.chat.ChatAreaController.addMuc(ChatAreaController.kt:28)
at org.alameyo.flame.views.home.roster.MultiUserChatView$root$1$1.invoke(MultiUserChatView.kt:18)
at org.alameyo.flame.views.home.roster.MultiUserChatView$root$1$1.invoke(MultiUserChatView.kt:9)
at tornadofx.LayoutsKt.vbox(Layouts.kt:388)
at tornadofx.LayoutsKt.vbox$default(Layouts.kt:103)
at org.alameyo.flame.views.home.roster.MultiUserChatView$root$1.invoke(MultiUserChatView.kt:15)
at org.alameyo.flame.views.home.roster.MultiUserChatView$root$1.invoke(MultiUserChatView.kt:9)
at tornadofx.LayoutsKt.scrollpane(Layouts.kt:457)
at tornadofx.LayoutsKt.scrollpane$default(Layouts.kt:204)
at org.alameyo.flame.views.home.roster.MultiUserChatView.(MultiUserChatView.kt:14)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at java.lang.Class.newInstance(Class.java:442)
at tornadofx.FXKt.find(FX.kt:410)
at org.alameyo.flame.views.home.roster.LeftSideView$$special$$inlined$inject$2.getValue(Component.kt:1197)
at org.alameyo.flame.views.home.roster.LeftSideView$$special$$inlined$inject$2.getValue(Component.kt:173)
at org.alameyo.flame.views.home.roster.LeftSideView.getMultiUserChatView(LeftSideView.kt)
at org.alameyo.flame.views.home.roster.LeftSideView.access$getMultiUserChatView$p(LeftSideView.kt:8)
at org.alameyo.flame.views.home.roster.LeftSideView$root$1$2.invoke(LeftSideView.kt:19)
at org.alameyo.flame.views.home.roster.LeftSideView$root$1$2.invoke(LeftSideView.kt:8)
at tornadofx.TabPaneKt.tab(TabPane.kt:169)
at tornadofx.TabPaneKt.tab$default(TabPane.kt:165)
at org.alameyo.flame.views.home.roster.LeftSideView$root$1.invoke(LeftSideView.kt:18)
at org.alameyo.flame.views.home.roster.LeftSideView$root$1.invoke(LeftSideView.kt:8)
at tornadofx.TabPaneKt.tabpane(TabPane.kt:188)
at org.alameyo.flame.views.home.roster.LeftSideView.(LeftSideView.kt:13)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at java.lang.Class.newInstance(Class.java:442)
at tornadofx.FXKt.find(FX.kt:410)
at org.alameyo.flame.views.home.FlameApplicationView$$special$$inlined$inject$2.getValue(Component.kt:1197)
at org.alameyo.flame.views.home.FlameApplicationView$$special$$inlined$inject$2.getValue(Component.kt:173)
at org.alameyo.flame.views.home.FlameApplicationView.getLeftSideView(FlameApplicationView.kt)
at org.alameyo.flame.views.home.FlameApplicationView.access$getLeftSideView$p(FlameApplicationView.kt:9)
at org.alameyo.flame.views.home.FlameApplicationView$root$1.invoke(FlameApplicationView.kt:19)
at org.alameyo.flame.views.home.FlameApplicationView$root$1.invoke(FlameApplicationView.kt:9)
at tornadofx.LayoutsKt.borderpane(Layouts.kt:420)
at org.alameyo.flame.views.home.FlameApplicationView.(FlameApplicationView.kt:15)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at java.lang.Class.newInstance(Class.java:442)
at tornadofx.FXKt.find(FX.kt:410)
at tornadofx.FXKt.find$default(FX.kt:399)
at tornadofx.UIComponent.replaceWith(Component.kt:1123)
at org.alameyo.flame.views.login.LoginView$root$1$1$1$1$3$1$2.invoke(LoginView.kt:102)
at org.alameyo.flame.views.login.LoginView$root$1$1$1$1$3$1$2.invoke(LoginView.kt:11)
at tornadofx.AsyncKt$success$$inlined$apply$lambda$1$1.handle(Async.kt:110)
at tornadofx.AsyncKt$success$$inlined$apply$lambda$1$1.handle(Async.kt)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.concurrent.EventHelper.fireEvent(EventHelper.java:219)
at javafx.concurrent.Task.fireEvent(Task.java:1356)
at javafx.concurrent.Task.setState(Task.java:723)
at javafx.concurrent.Task$TaskCallable.lambda$call$506(Task.java:1434)
at com.sun.javafx.application.PlatformImpl.lambda$null$177(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$178(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$152(WinApplication.java:177)
at java.lang.Thread.run(Thread.java:748)