another update for TCODE

CHANGELOG.md

@@ -13,6 +13,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Update tests to adapt to changes in RegistrationValidation.java
 - Removed the auto-population of username and made the field editable.
 - Added back email confirmation during registration to CAC users.
+- Added mm_id during registration for TCODE mattermost.
 
 
 ## [3.5.7] - 2024-10-02

p1-keycloak-plugin/src/main/java/dod/p1/keycloak/registration/RegistrationValidation.java

@@ -213,6 +213,7 @@ public class RegistrationValidation extends RegistrationUserCreation {
     private static void generateUniqueStringIdForMattermost(
         final MultivaluedMap<String, String> formData,
         final UserModel user) {
+
         String email = formData.getFirst(Validation.FIELD_EMAIL);
 
         byte[] encodedEmail;
@@ -227,6 +228,9 @@ public class RegistrationValidation extends RegistrationUserCreation {
         SimpleDateFormat formatDate = new SimpleDateFormat("yyDHmsS");
 
         user.setSingleAttribute("mattermostid", formatDate.format(today) + emailByteTotal);
+
+        // Added attribute for TCODE mattermost
+        user.setSingleAttribute("mm_id", formData.getFirst(Validation.FIELD_USERNAME));
     }
 
     /**