refactor

src/main/java/com/aruba/simpl/usersroles/model/event/InvalidateMtls.java

 package com.aruba.simpl.usersroles.model.event;
 
+import com.aruba.simpl.usersroles.model.entities.Credential;
 import jakarta.annotation.Nullable;
 import lombok.Value;
 
 @Value
 public class InvalidateMtls {
-    @Nullable byte[] newCredential;
+    @Nullable Credential newCredential;
 }