django - How to register a visitor (guest), after submitting an order form, and immediately authorize his on site with this data? -

there django 1.11.5 override user model (client). authorization occurs email + password, fields removed in admin panel, otherwise - standard model of user django (i use abstractuser). also, there application (order_form) many fields can filled in both guests , authorized site visitors.

how make sure when send form, if visitor guest (unauthorized) , not have account on site (check email), automatically registered (with email indicated in form , randomly generated password + sending letter data mail)?

also, redirect personal cabinet , authorize user, using email , generated password.

i glad help.