Accountsfor SAP HANA Cockpit

Hello Experts！

I applied an free trial on SAP HANA Cloud Platform, and I have created a database. According to the document(Hello World! Develop your first HANA Application | SAP)

I need to click the SAP HANA Cockpit to activate. But after I click it, the page requires the account and password to login..But I have tried all the possible account and no one successed..

So could someone tell me which account should I use or where to re-set the password?

Thanks a lot !!