However I dont understand the below point. Which URL do I need to access to get these 2 parameters? I don't understand what is meant by this line (the URL that you have received during the redirection) as after allowing the app it redirects to the redirect_uri value.
Next, you will have to exchange the "access_code" for a real "Access Token". In order to do that, you will have to parse two parameters from the URL (the URL that you have received during the redirection):
Hi yaghwin. I suggest you the follow steps
1. read page 3 of this posting where I explained step by step the process
2. You cannot just do step 2 from your form, you have to do step1 and immediatelly step 2. Somebody noted that these requests have to be done one after another.
3. If that doesn't help please provide 2 full requests captured by any http tracing tool, then we can try to analize them. Only that will give us a full picture. For axample in the request above I don't see "redirect_uri" provided. Was it? That why full packet tracing is important
You said "The submission URL asks me for credentials"? What URL is that?