478 fix create account's form issue and a couple of more minor fixes (#480)

* fix  issue when get_accounts API call fails

* reset an error before making api call

* one more fix

* better handle existing email edge case

* use 302 redirects not 301

* Replace Math.random with secure-random. #478

* Lock down confirm email lookup to email identity provider records. #478

* Start over link more consistent order by in Identites sql. #478

* Revert "Start over link more consistent order by in Identites sql. #478"

This reverts commit dea06a543f6ee288d05a9d976710712fad47028d.

* reset session.user in /enter_email

* start registration process if user get to create_account page and has no id in session yet

* Add a few DESC to Identity.ID order by.

* update comment