OpenVPN and radius how to add user to radius

[trinitech]

Hi,

I just created a radius server using this https://docs.opnsense.org/manual/how-tos/user-radius.html?highlight=radius
System ‣ Access ‣ Servers and click on Add server

When I go System ‣ Access ‣ Tester I enter my user details but I cannot authenticate

Could anyone please tell me how do I add my user to the radius server?

Thank you