Some caveats at the moment:
Minimum requirements for users databag format:
Users -id --groups ---sysadmin --htaccess // in order to have access to site through webui --icinga ---email // this key must exist for each user with a sysadmin group value (above)
Note: the htpasswd value must be generated with: htpasswd -nb <username> <password>
Also, you will need one node with a "monitoring" role (I applying it to my icinga node, and this can be just a skeleton. This is just so that one of the templates generates correctly, and this requirement will likely be alleviated in future versions.