@tklengyel @WPalant @thisismissem Just connect to it with a GUI tool like dbeaver (like devs are likely to do), it will show you the schema of tables.
There will be columns like “clientName” or similar, and then doing a few very simple selects will tell you whether you have access to other people’s data.
@tklengyel @WPalant @thisismissem Mixing customer data like that and giving full access to the database with the given user credentials is criminal neglect and should cost the company dearly. Not the person who figured it out.