Some help regarding OAth and validation

Thank you for your fast response first of all. I’m using java and i really can’t understand the links of those redirects in order to obtain an auth code. Guide in twitch is kinda unfriendly for new developers.

As i said i already created my Client-ID and my Secret ID from Twitch Developers.

Now i guess i need to use some url to add those 2 id’s as header and request some Bearer code?
That what i’m asking the steps until the moment that i can do a HTTP request and get data for users.

Thank you again for your time.