Migration for createdAt and updatedAt field for userCollection if not present (#5249)

app/server/appsmith-server/src/main/java/com/appsmith/server/migrations/DatabaseChangelog.java

@@ -2562,5 +2562,27 @@ public class DatabaseChangelog {
 //        }
 //    }
 
+    
+    @ChangeSet(order = "074", id = "ensure-user-created-and-updated-at-fields", author = "")
+    public void ensureUserCreatedAndUpdatedAt(MongoTemplate mongoTemplate) {
+        final List<User> missingCreatedAt = mongoTemplate.find(
+            query(where("createdAt").exists(false)),
+            User.class
+        );
 
+        for (User user : missingCreatedAt) {
+            user.setCreatedAt(Instant.parse("2019-01-07T00:00:00.00Z"));
+            mongoTemplate.save(user);
+        }
+
+        final List<User> missingUpdatedAt = mongoTemplate.find(
+            query(where("updatedAt").exists(false)),
+            User.class
+        );
+
+        for (User user : missingUpdatedAt) {
+            user.setUpdatedAt(Instant.now());
+            mongoTemplate.save(user);
+        }
+    }
 }