Trying to implement zoom-oauth

Step 1, I am acquiring an authorization code from authorize endpoint.
On step 2 I am hitting this endpoint: and passing the value from step 1 to the code field.

I am passing “grant_type” as “authorization_code”.

Here is the response being provided: {“reason”:“unsupported grant type”,“error”:“unsupported_grant_type”}

Why is it saying “unsupported grant type?” This is exactly what the docs instruct you to do.
I tried all the possible ways like

headers: {
      'Content-Type': 'application/x-www-form-urlencoded',
      'Authorization': 'Basic '+Buffer.from(`${'C_ID'}:${'Secret_KEY'}`).toString('base64'),
 var data =  JSON.stringify({
   code: req.query.code,
   grant_type: 'authorization_code',
    redirect_uri: 'http://localhost:5000'

this is payload, but still i am not getting
any help would be great…

Thanks in advance…

Thank you for posting in the Zoom Developer Forum. Please see the example OAuth Sample for reference :

Zoom OAuth Hello World

User Level OAuth Starter

Zoom Server-to-Server (s2s) Oauth Token Generation

Let us know if this helps.

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