Redirect using a path My question seems to be obvious but I really don't find the solution.
Well, I want to redirect to my view just after connexion.
I try to use $form_state->setRedirect,but It's seems it needs the route name. 
I don't find the route name of my view!
How to get a route name from a path? Or to redirect using the path?
You can also use setRedirectUrl(), which needs a URL object. There are many ways to create one, for example for an arbitrary path: Url::fromUri('base:some/path')