Hi,
I have registered to promotional page of Salesforce DX with my company email address and username companyemailaddress.devhub.
I did get an email to verify the account. Clicking on it displays the page with password and username. Anyway which send me another email with link : https://firefly-serenity-146775.my.salesforce.com, which also redirect me to password and username page.

How to login into the org?