Fixing issue in members list nor being initialized when converting to…

… response.

src/main/java/com/MTAPizza/Sympoll/groupmanagementservice/model/Group.java

@@ -36,7 +36,7 @@ public class Group {
 
     @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, orphanRemoval = true)
     @JoinColumn(name = "group_id")
-    private List<Member> membersList = new ArrayList<>();           // Initialize to an empty members list.
+    private List<Member> membersList;           // Initialize to an empty members list.
 
     // TODO: Add Admins list, will be initialized with the creatorId as the only admin.
 
@@ -47,7 +47,7 @@ public GroupResponse toGroupResponse() {
                 description,
                 creatorId,
                 timeCreated,
-                membersList.stream().map(Member::toMemberResponse).toList() // Convert to member response
+                membersList != null ? membersList.stream().map(Member::toMemberResponse).toList() : new ArrayList<>() // Convert to member response
         );
     }
 }

src/main/java/com/MTAPizza/Sympoll/groupmanagementservice/service/GroupService.java

@@ -23,7 +23,7 @@ public GroupResponse createGroup(GroupCreateRequest groupCreateRequest) {
 
         // TODO: Add creator Id into a new list of admins
         Group createdGroup = Group.builder()
-                .groupId(groupIdReceived != null ? groupIdReceived : UUID.randomUUID().toString()) // If defined a group ID then use it, otherwise generate random group ID.
+                .groupId(groupIdReceived != null ? groupIdReceived : UUID.randomUUID().toString().replaceAll("[^0-9]", "")) // If defined a group ID then use it, otherwise generate random group ID.
                 .groupName(groupCreateRequest.groupName())
                 .description(groupCreateRequest.description())
                 .creatorId(groupCreateRequest.creatorId())