ASP regain. What’s it doing and the intention in which could i bypass it?

I am making an attempt to utilize python to web the full recordsdata off this place https://www.bca.co.uk/, i have computerized the login with selenium nonetheless, the server won’t response with RESPONSE200 except i put this cookie for:

*'.AspNet.Forms': '2OMeYV7pWPi_4HrHD1LtHvmzTKYDbUj0u266i0….
*

I in fact have researched what ASP regain is, but it does now not abet me complete this task. It does now not looks to be returned in a driver.get_cookies() set a query to. Any insight could well perhaps be vastly received.