i want to install Ambari 2.7.5, refer to page  https://docs.cloudera.com/HDPDocuments/Ambari-2.7.5.0/bk_ambari-installation/content/access_ambari_paywall.html .   after log in to cloudera and navigate to https://my.cloudera.com/ . I'm can't file a non-technical case within the support portal (https://my.cloudera.com) to obtain credentials. because i haven't Permission.   what should i do.   Thank everyone. ... View more