请问cloudera manager内嵌的postgresql超级用户是哪个如何登陆

因为想要备份数据库[mw_shl_code=shell,true]scm=> \du
            角色列表
角色名称 | 属性 | 成员属于
--------------+----------+----------
amon       |       | {}
cloudera-scm | 超级用户 | {}
            : 建立角色
            : 建立 DB
hive       |       | {}
hmon       |       | {}
nav       |       | {}
rman       |       | {}
scm       |       | {}
smon       |       | {}[/mw_shl_code]

超级用户是cloudera-scm

查看这个文件发现
[root@master data]# more generated_password.txt
gXL7vON7Ko

The password above was generated by /usr/share/cmf/bin/initialize_embedded_db.sh (part of the cloudera-manager-server-db package)
and is the password for the user 'cloudera-scm' for the database in the current directory.

密码是gXL7vON7Ko
但是登陆
-bash-4.1$ psql --port=7432 --username=cloudera-scm
用户 cloudera-scm 的口令：
psql: FATAL:  database "cloudera-scm" does not exist

那么我如何备份呢？
因为我要按照这个文章
http://www.cloudera.com/content/ ... eig_topic_19_2.html
做 restore a Cloudera Manager deployment from database backups when the database server is not available