add un-confirm option to user:confirm, hide New button from dashboard if user isn't confirmed

app/Console/Commands/ConfirmUser.php

@@ -12,7 +12,7 @@ class ConfirmUser extends Command
      *
      * @var string
      */
-    protected $signature = 'user:confirm {user}';
+    protected $signature = 'user:confirm {user} {--undo}';
 
     /**
      * The console command description.
@@ -39,7 +39,15 @@ class ConfirmUser extends Command
     public function handle()
     {
         $u = User::resolve($this->argument('user'));
-        $u->update(['confirmed' => true]);
-        $this->info("User #$u->id with e-mail $u->email and handle @$u->name was confirmed.");
+
+        $un='';
+        if ($this->hasOption('undo')) {
+            $u->update(['confirmed' => false]);
+            $un='un';
+        } else {
+            $u->update(['confirmed' => true]);
+        }
+
+        $this->info("User #$u->id with e-mail $u->email and handle @$u->name was {$un}confirmed.");
     }
 }