Hi Ciro,
You can create Multiple Virtual accounts users for your Smart account. Please visit Cisco Software central > Manage Smart accounts > Users.
https://software.cisco.com/
If you want to create users on the vManage, you can do so by clicking on Administration > Manage users > Add users. You can assign roles to user based on "User Groups" options. please refer the below link for more details.
https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/system-interface/vedge-20-x/systems-interfaces-book/rbac.html
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You can also learn more about Cisco SD-WAN through our live Ask the Experts (ATXs) session. Check out the ATXs Resources
[https://community.cisco.com/t5/networking-knowledge-base/cisco-dna-center-ask-the-experts-resources/ta-p/4394489] to view the latest schedule for upcoming sessions, as well as the useful references, e.g. online guides, FAQs.
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- Praveen Anand