SuiteCRM 8 API Getting Access Token

Hi, Im new to API and I was trying to setup the api in postman but cant seem to work.
I already imported the examples on Api/docs/postman and the environments

url: http://localhost/legacy/Api
token: http://localhost/legacy/Api/access_token

but when I run the sample request it returns error access denied.

I tried to access the token url in browser and it returns Method not allowed. Must be one of: POST

Perhaps an obvious question but were you able to set up the API without Postman and you made a successful connection?

I believe the POSTMAN documentation only has structure of calls rather than usable access tokens which you need to set up in the instance itself.

If you haven’t already have a walkthrough on setting up the instance and access tokens before trying it out with POSTMAN.