approve reviewer's change

Co-authored-by: Arne Keller <[email protected]>

nixos/modules/services/networking/crproxy.nix

@@ -150,7 +150,7 @@ in
           (optionals useAllowImageList [ "--allow-image-list-from-file=${allowImageListFile}" ])
           (optionals useAllowImageList [ "--block-message=${cfg.blockMessage}" ])
           (optionals useBlockIPList [ "--block-ip-list-from-file=${blockIPListFile}" ])
-          (optionals cfg.simpleAuth [ "--simple-auth" ])
+          (optionals (cfg.simpleAuthUser != []) [ "--simple-auth" ])
           (map (e: "--simple-auth-user=${e}") cfg.simpleAuthUser)
           (map (e: "--allow-host-list=${e}") cfg.allowHostList)
           (map (e: "--privileged-ip-list=${e}") cfg.privilegedIPList)