@Fabian Hi Fabian, after checking with my colleague, I’m afraid that it is currently not possible for co-authors to add new tables. For security reasons, we have decided to not expose the app owner’s data to co-authors. Also, when you add a new data source through the app editor, the data source will be added to your account, and not the app owner’s account, which means that you will not see it in the editor.
Right now, the only way for co-authors to add new tables to apps is to use tables from team data sources. A team data source is shared by and visible to all members of a team. This feature is only available if you are in a team plan. However, we are looking into releasing a new option to let app owners to selectively allow co-authors to see and use certain data sources so that they too can add tables. If you want this feature, please request and vote for it in our feature request app:
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