"Invalid client_id or client_secret"

Hey @abhilash,

Did you include the required Authorization header in your request?

"Authorization": "Basic base64Encode(Client_Id:Client_Secret)"

(You can base64encode them here. Make sure to include the : in between your client_id and client_secret)

It will look something like this
"Authorization": "Basic YXNkZmFzZGZha3M6YWRramZiYXNrbGRqZmFzZGY="

Also, you need to change redirection_uri to redirect_uri.

Let me know if this works!

Thanks,
Tommy

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