Nginx grafana 6.2

we have upgrade grafana v5.2.4 to v6.2.0.
we had lost setting auth.proxy.
We had setting an autologin and it worked correctly , after of upgrade grafana this dont work,yet. Exists, any change in this version?

The error is that we lost of user

lvl=info msg=“Request Completed” logger=context userId=3 orgId=1 uname=admin method=GET path=/grafana/ status=404 remote_addr=x.x.x.x time_ms=27 size=44813 referer=
lvl=info msg=“Request Completed” logger=context userId=0 orgId=0 uname= method=GET path=/api/dashboards/uid/FAU_4FiWa status=401 remote_addr=x.x.x.x time_ms=0 size=26 referer=http://localhost:3000/grafana/d/FAU_4FiWa
lvl=dbug msg=“avatar.fetch(fetch new avatar):