Update description on bearer auth

[shunam]

add link to endpoint token so user know how to get access token.
add example to add to Authorization request header
removing client credential auth, because it will make user confuse.

ref: https://swagger.io/docs/specification/authentication/bearer-authentication/

[shunam]

here is the result.

[bigsolom]

It's fine to keep the long line as it was it you want, redocly will display the whole line underneath the title anyway

[bigsolom]

I would suggest to add a general description somewhere (maybe here) to how the whole authentication flow looks like

1. getting uid and secret from client settings in app.fortytools.com
2. getting access token from ...
3. use this access token in each API request as a header Authorization: Bearer .....

And by the way in case the toke expires, how would the client get a new token? should they call the same endpoint with client_id and client_secret again? Please document this as well