How to make authorization through OK?

Question

API

Good afternoon. I want to implement authorization in the React application through Ok , everything should jump on the client side. Maybe someone will have a ready-made code or be able to give step-by-step instructions, otherwise I'm a beginner and don't really understand yet.

Answer 1

Umm... Here, as if they will give you a code)
Check the documentation on working with the API for Ok

Answer 2

Who can tell me what the error is,
for authorization I used what came in the letter
Application ID:
XXXXXXXXXXX Public key of the application: XXXXXXXXXXXXXXXXXXXXXXXXX
Secret key of the application: XXXXXXXXXXXXXXXXXXXXXXXXXXXX