Asp.net核心表未在数据库中创建

When I see at other sample projects, the number of tables created for supporting Identity in the db is great (such ones as AspNetRoles, AspNetUserClaims, etc..), but in my case when I make the migration and the update only the User table has been created. What is the reason? Here is my code in the startup, in the dbcontext and my class user:When I see at other sample projects, the number