Get the list of Attributes

Hello,

I tried to call the attributes API following the instructions shown in the below link. I generated a bearer token and passed the token details to the postman. When I make a call, it gives me an authorization error. When I did the same with the Explore API, I got the reports, and the same thing is not working while calling the other APIs ( Attributes, Guardians Case, Guardian Sessions, Guardian Users, Guardian Call Quality ). Is there a different way to call these API's?

Attributes documentation:
https://docs.talkdesk.com/reference/attributes-list

API link:
https://api.talkdeskapp.com/attributes

Error Message:
{
"code": "0011016",
"message": "Unauthorized"
}