Fix: Failed authentication #1704 (#1708)

* Fix: Failed authentication #1704

* Update account.html

src/main/java/stirling/software/SPDF/model/Authority.java

@@ -1,5 +1,7 @@
 package stirling.software.SPDF.model;
 
+import java.io.Serializable;
+
 import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
 import jakarta.persistence.GeneratedValue;
@@ -11,7 +13,9 @@ import jakarta.persistence.Table;
 
 @Entity
 @Table(name = "authorities")
-public class Authority {
+public class Authority implements Serializable {
+
+    private static final long serialVersionUID = 1L;
 
     public Authority() {}
 

src/main/java/stirling/software/SPDF/model/User.java

@@ -1,5 +1,6 @@
 package stirling.software.SPDF.model;
 
+import java.io.Serializable;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Map;
@@ -23,7 +24,9 @@ import jakarta.persistence.Table;
 
 @Entity
 @Table(name = "users")
-public class User {
+public class User implements Serializable {
+
+    private static final long serialVersionUID = 1L;
 
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)