Realm Sync

Contact.java

//ROS_CONTACTS_REALM_URL = realm://192.168.1.98:9080/lynxenger/contacts

public static void initContactsRealm(final SyncUser user, final String username) {
    if (!user.isAdmin())
        return;
    user.getManagementRealm().executeTransaction(new Realm.Transaction() {
        @Override
        public void execute(Realm realm) {
            Boolean mayRead = true;
            Boolean mayWrite = true;
            Boolean mayManage = true;
            PermissionChange change = new PermissionChange(LynxengerApplication.ROS_CONTACTS_REALM_URL, "*", mayRead, mayWrite, mayManage);
            realm.insert(change);
        }
    });
    SyncConfiguration configuration = new SyncConfiguration.Builder(user, LynxengerApplication.ROS_CONTACTS_REALM_URL).schemaVersion(BuildConfig.SCHEMA_VERSION).build();
    Realm r = Realm.getInstance(configuration); // Retrieves remote contacts realm
    long count = r.where(Contact.class).equalTo("userId", user.getIdentity()).count();
    if (count == 0)
        r.executeTransactionAsync(new Realm.Transaction() {
            @Override
            public void execute(Realm realm) {
                Contact c = realm.createObject(Contact.class);
                c.setUserId(user.getIdentity());
                c.setCreatedOn(new Date());
                c.setUsername(username);
                c.setLastLoggedIn(new Date());
            }
        });
    r.close();
}

Small point (unrelated to permission bug) but looking over this code, the query/count check is unsafe since the downloading of the data from the Realm occurs asynchronously vs. the query will be applied synchronously.