Click on the gear icon in the main menu, then hover the word Users, and click on Configure.
Click + at the top, then on User to create a new user.
Fill in the information and click on the save icon. Sengerio will send, to the email specified by you, an email with the credentials to access the application. A new user automatically obtains the role of Superuser (manage the roles.)
To modify an already existing user, click on it or right click in the list and then click Edit.