# Displaying messages only to users in Firebase list **URL:** \ **Category:** Questions about Thunkable X\ **Tags:** firebase, beginner\ **Created:** [September 18, 2023, 3:53pm UTC](https://community.thunkable.com/t/displaying-messages-only-to-users-in-firebase-list/2601606 "2023-09-18T15:53:18Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![info3tpk40](https://avatars.discourse-cdn.com/v4/letter/i/eb8c5e/32.png) [@info3tpk40](https://community.thunkable.com/u/info3tpk40)\ **Post date:** [September 18, 2023, 3:53pm UTC](https://community.thunkable.com/t/displaying-messages-only-to-users-in-firebase-list/2601606/1 "2023-09-18T15:53:18Z")
Hi, I am creating an audiobook app. Once a user has recorded their audio, I upload the audio URL in Firebase under the ‘Voiceadded’ cloud variable, along with their UserID. I would like the button ‘add your voice’ to only be visible to users who have not yet recorded their audio, and there userID is not in the cloud variable. I am trying to use ‘does list cloud variable contain UserID’ but it is not working. Any help would be really appreciated!! Below are the blocks: ![Screen Shot 2023-09-18 at 16.51.45](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/3/3/33d42239999ab0a5b5195b4ae3ce992decc4c43f.png) ![Screen Shot 2023-09-18 at 16.52.50](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/1/8/1866aa500f72713d1836ed1193b16eaf92eeb82e.png) ---
**Author:** ![system](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/0/f/0f59f292712368bce16ff80133ae10de8a6f27e8.png) [@system](https://community.thunkable.com/u/system)\ **Post date:** [December 17, 2023, 3:54pm UTC](https://community.thunkable.com/t/displaying-messages-only-to-users-in-firebase-list/2601606/2 "2023-12-17T15:54:14Z")
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