Access code is not working showing 401 unauthorized

{
“status”: “failure”,
“code”: 3,
“data”: null,
“message”: “Authorization failed.”
}

what i did wrong?

its ok i have corrected.

how did you correct it?
Can you please give any hint?

Practise first in API Explorer. Check if all the necessary fields are correct!

Hey, I am not able to resolve this issue, can u help me out please??