Custom Database Roles

Feature request Is your feature request related to a problem? Please describe. In a multi-tenant app, I would have 5-10 user levels, which would have different column level authorization. For example, a tenant would have such user groups: "client", "employee", "manager", "director", "approver", "admin", etc. Each level has different select, insert and update authorization for columns. For example, a "client" can see product names, but not prices. An "employee" can see product prices, and update product features, but can not update prices. An "approver" can only see the transaction date, and sale price, and only update the is_approved field. Describe the solution you'd like I would like Supabase to support custom database users, so I can group app users under several database users. So I can combine app user identity (for Row Level Security) with a database user identity (for Colu…