title: asp.net core 2 identity "Remember me" does not work
body: <p>I have created a new asp.net core2 web application using Individual User Accounts - I'm new to asp.net core identity. I'm using VS 2017. I've made no change to the code generated by VS. I ran the project and registered a new user successfully. But when I login and check the "Remember me?" checkbox, then after signing out and trying to sign in again, It forgoes me and I must type my username and password again! So what is the problem?</p>