refresh page after success login go to login page why and h

problem

When Make login and refresh or reload page after login it come back to login page ?

I work on asp.net MVC project web API work with angular 7 project client side .

my problem is when write user name and password correct it make login and go to dashboard page that I done to work after login succeed .

but problem after i succeed login and go to dashboard if i make refresh or reload to page dashboard it go to the login page .

so that how to handle this echo on angular 7