Login failure while doing Grafana getting started tutorial

I am having login problems with logging in while following a getting start tutorial Getting Started with Grafana Alerting. That tutorial says that I will be automatically logged in when I navigate to localhost:3000 where Grafana is running. That is not happening. When I try to log in dev tools posts that I get a POST error http://localhost:3000/login 401 (Unauthorized). It is coming from backend_srv.ts:131.

Are you using the default user name and password?

admin
admin

Well, duh. No, I was using my Grafana login. It is now working. Thanx.