Change login and password

Some time ago I installed Grafana, I was able to access my database and created test dashboards. But after a while without using it, I don’t really remember the password and when I try to recover by informing my email, I end up not solving my problem. I uninstalled Grafana and its dependencies to see if it would be admin again (login and password), but unfortunately it didn’t work.
Does anyone know how I can resolve my access to Grafana?
Thank you very much in advance.