Please tell!
Ques 1)Which is the correct way to set the header while doing Custom Integration of DocuSign with Salesforce?
req.setHeader('Authorization', 'Basic ' + EncodingUtil.base64Encode(INTEGRATOR_KEY + ':' + SECRET_KEY)); OR
req.setHeader('Content-Type', 'application/x-www-form-urlencoded');
Ques 2) What is referred as secret key in DocuSign how can i navigate there in DocuSign?
Ques 3) I am getting the Authorization code but to get accessToken i am getting status code 400 in Custom Integration any suggestions are welcome!!
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DocuSign Custom Integration with Salesforce

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