How to get access and referesh token without code

Hello Team,
I m trying to get access token by using below details but i m getting this error:
“success”: false,
“message”: "Invalid parameter: client_secret",
“error”: “invalid_request”

method: post

Kindly help me how can i get token by api, i m trying this via postman.

Hi @Rohit_Bharti

It’s not possible to get access and refresh tokens without code. Please check this page for more details OAuth authorization.

Also, client_secret is a secret value and should not be shared publicly. To be safe, please regenerate yours in Marketplace manager.

thanks for response.
Kindly tell me how can i get the code from where?

code is a dynamic value, please check step 3.

Hi mykhailo,
We are trying to Requesting authorization by using below process:

I am getting the below error:
“success”: false,
“error”: “unauthorized access”,
“errorCode”: 401,
“error_info”: “Please check