I am learning the Navigraph developer potal.
In the PKCE authorization section, ```
POST /connect/deviceauthorization HTTP/1.1
Host: identity.api.navigraph.com
Content-Type: application/x-www-form-urlencoded
client_id=&client_secret=&code_challenge=<code_challenge>&code_challenge_method=S256
I want to know that the client_id and client_secret mean?how to get them?