Fix SWCommand error message

SpigotCore_Main/src/de/steamwar/command/SWCommand.java

@@ -79,9 +79,12 @@ public abstract class SWCommand {
             addMapper(ClassMapper.class, method, i -> i == 0, false, TypeMapper.class, (anno, typeMapper) -> {
                 (anno.local() ? localTypeMapper : SWCommandUtils.MAPPER_FUNCTIONS).putIfAbsent(anno.value().getTypeName(), typeMapper);
             });
-            add(Register.class, method, i -> i != 2, true, null, (anno, parameters) -> {
+            add(Register.class, method, i -> i > 0, true, null, (anno, parameters) -> {
                 if (!anno.help()) return;
                 List<String> errors = new ArrayList<>();
+                if (parameters.length != 2) {
+                    errors.add("The method '" + method.toString() + "' is lacking parameters or has too many");
+                }
                 if (!parameters[parameters.length - 1].isVarArgs()) {
                     errors.add("The method '" + method.toString() + "' is lacking the varArgs parameters as last Argument");
                 }