Customised user registration and login screen using asp.net mvc core indentity

Hi

I want to create a customised user registration using asp.net mvc core identity.  In my user table I  have the following  column

UserName ,Password,EmailAddress.  

Username and Password is the column which are used for login into the home page .  I need to have only three column in the  user identity table. Please can you give me a sample program to customise registration and login page using asp.net mvc core identity.

Pol