Oauth Between two SN Instances

[Shivalika]

I really need help in figuring this out. I don't understand what I am missing, I had done it just yesterday and it was working nicely, today I am doing it in a new instance and I have been getting same error for like 2+ hours now. Please help.

This is Oauth Client Instance. 

This is Oauth Provider instance. 

This is my rest message. 

This is the window I am being redirected to when I click on "Get Oauth Token" in "related links". Firstly, which password is required here? dev188196 password? or the instance that's provider or dev 199658

This is the error I have gotten for the millionth time, please check what's the issue. And Read full question please, I have mentioned all the information.

[Shivalika · Accepted solution]

I just resolved it, man  I was giving my client instance's name in token url and authorize url, I had to give for my provider instance. And Username and password is also given for Provider instance. 

[Shruti]

Make sure the OAuth entity profile grant type is same as default grant type