OIDC settings updated

start.sh

@@ -40,7 +40,7 @@ if [[ -n "${CLOUDRON_OIDC_ISSUER:-}" ]]; then
         -e "s/OIDC_REDIRECT_URI=.*/OIDC_REDIRECT_URI=${CLOUDRON_APP_ORIGIN//\//\\\/}\/auth\/auth\/openid_connect\/callback/g" \
         -e "s/OIDC_DISCOVERY=.*/OIDC_DISCOVERY=true/g" \
         -e "s/OIDC_SCOPE=.*/OIDC_SCOPE=openid,profile,email/g" \
-        -e "s/OIDC_UID_FIELD=.*/OIDC_UID_FIELD=sub/g" \
+        -e "s/OIDC_UID_FIELD=.*/OIDC_UID_FIELD=preferred_username/g" \
         -e "s/OIDC_SECURITY_ASSUME_EMAIL_IS_VERIFIED=.*/OIDC_SECURITY_ASSUME_EMAIL_IS_VERIFIED=true/g" \
         -i /app/data/env.production
 fi