I need feedback on this idea

At my full time job Ive had to deal with the management of lots of user accounts on different systems.

For example: when someone joins the company I create a user for them and put them in a group within postgres.

Postgres specifically is kind of annoying to work with. I typically don't use a GUI and I'll do it all through command line. All the different interfaces I've tried in the past like datagrip or pgadmin don't have the best UX for managing users.

So I'd like to create a SaaS app where you can manage postgres users/groups. Everything delivered in a beautiful UI where everything is intuitive to work with. This way it doesn't have to be an engineer that manages the users but it can also be a non technical manager.

I've thought of a lot of issues with this idea but the main one is Security. To be able to create users and roles the app would need admin access to their database. A lot of people don't feel comfortable giving admin access to some app hosted in the "cloud". I could easily encourage the end user to just whitelist my server's IP address but it's still seen as a security issue from the getgo.

The other issue I see is that this already exists like I mentioned in apps like pgadmin. So trying to market to people that might not even see this as a problem.

Some of the features that I would build to convince people to buy:

create/delete/edit users
create/delete/edit groups
assign users to group
awesome UI / easily see what users/groups have access to what tables

These are the differentiators:

see which user runs the most queries
login audit log for all users
alerts for things like: tell me when a user logs in at night or alert me if a user drops a table
view all login IPs on a map to make sure everyone is logging in within the US

Let me know what you think.
Thanks