An attribute whose value uniquely identifies an object is called a(n)

This is called a key attribute!

There are different types of key attributes!

Primary key is the key that is actually chosen, for example a social security number. 

There is also a unique key, say our finger prints! they also uniquely identify humans, but usually we prefer to use social security number when we list people (a unique key could be a primary key if we chose so)

We could also identify people by their social security number and a name, but this is unnecessary, as social security number already gives a full identification. Such a reduntant key is called super key. 

You click on it and type

Discord1.on desktop, download the discord app and open it.2.click connections in the menu on the left.3.click spotify.4.a web page will open to connect. if you're not already logged into spotify on the device, you're directed to log in or sign up first.5.click okay to confirm.