New config option disable email change

.env.template

@@ -97,6 +97,10 @@
 ## Disabled by default. Also check the EVENT_CLEANUP_SCHEDULE and EVENTS_DAYS_RETAIN settings.
 # ORG_EVENTS_ENABLED=false
 
+## Controls whether users can change their email.
+## This setting applies globally to all users
+# EMAIL_CHANGE_ALLOWED=true
+
 ## Number of days to retain events stored in the database.
 ## If unset (the default), events are kept indefinitely and the scheduled job is disabled!
 # EVENTS_DAYS_RETAIN=