If you're on a regular or professional Emma account, there is only one login for that account. Emma has agency or organizational accounts that support multiple managers, even if there is only one "sub" account underneath the agency.
There is some chatter about tools from the Emma team to handle multiple users (individual logins), but I don't think anything has been officially announced.
Hi ToolLife -- Just chiming in here to echo what Kyle said. We are planning to build out multi-user functionality for our professional accounts. You can read more about that here, and don't hesitate to add your vote as well!