How to solve problem:
1. Page sign in.
2. Page sign in have CSRF code.
3. I am typing wrong email or pwd.
4. Message:"something wrong in your pwd or emal".
5. I am clicked on "BACK" button in browser.
6. I am typed right email and pwd... click on button submit.
7. Message: "Sorry CSRF is not matched" or redirects again on login form.
8. Angry user click X to exit from my web site.
How to solve problem with CSRF by clicking the back button and automatically reload csrf code?