Adding a table without primary key in .Net Core Api

I am using Scaffold-DbContext to set up my models but unfortunately there is a table in our database which does not have primary key. I know it sounds strange and I was shocked to see a table without primary key. Long story short, how can I add a table without a primary key? I read this link Scaffold-DbContext creating model for table without a primary key but it said its still in backlog.