mediagoblin admin user

src/freedombone-app-mediagoblin

 
     su -c "cd $MEDIAGOBLIN_BASE_DIR/mediagoblin/ && bin/gmg dbupdate" - mediagoblin
     su -c "cd $MEDIAGOBLIN_BASE_DIR/mediagoblin/ && bin/gmg adduser --username $MY_USERNAME --password admin $MEDIAGOBLIN_ADMIN_PASSWORD" - mediagoblin
-    su -c "cd $MEDIAGOBLIN_BASE_DIR/mediagoblin/ && bin/gmg makeadmin admin" - mediagoblin
+    su -c "cd $MEDIAGOBLIN_BASE_DIR/mediagoblin/ && bin/gmg makeadmin $MY_USERNAME" - mediagoblin
 
     echo '[Unit]' > /etc/systemd/system/mediagoblin.service
     echo 'Description=Media service' >> /etc/systemd/system/mediagoblin.service