* API: first version to send events about login actions

* API: improve login actions events

* Login: update auth test with new behavior

* Login: update auth test for auth module

* Login OAuth: improve functions structure

* API: make struct public to use for saml

* API: add send login log tests for grafana and ldap login

* API: remove log from tests

* Login API: fix test linting

* Update pkg/api/login_oauth.go

Co-authored-by: Emil Tullstedt <emil.tullstedt@grafana.com>

* Login API: refactor using defer

Co-authored-by: Emil Tullstedt <emil.tullstedt@grafana.com>