In the documentation https://dev.twitch.tv/docs/authentication#oidc-authorization-code-flow-id-tokens-and-user-access-tokens
It requires to send a user to the authorize endpoint. However the accompanied curl in the documentation tells us to add a header?
curl -H 'Accept: application/vnd.twitchtv.v5+json' \
-X GET 'https://api.twitch.tv/kraken/oauth2/authorize?response_type=code&client_id=uo6dggojyb8d6soh92zknwmi5ej1q2&redirect_uri=http://localhost&scope=viewing_activity_read&state=c3ab8aa609ea11e793ae92361f002671'
How are we supposed to signal a browser to send a url with a specific header?