Ionic Auth token to create security profile

Hi! I am trying to create a security profile for my app via Postman.
I did it on the site and saw that on the creation request, an authorization header is sent with the value "Bearer " + authToken. Where can I get that authToken? Or how can I generate it?
I tried using a token created on the site on the API Keys tab, but when I use that token on the security profile creation request, I get a “500: Internal Server Error” message.

Any help please?