JWT Authentication returning error while matching code examples

What about RSA keypair, did you create one? do you have the private key file copy/pasted exactly the same into your C# project?

The example project from DocuSign has this:

accessToken = JwtAuth.AuthenticateWithJwt("ESignature", ConfigurationManager.AppSettings["ClientId"], ConfigurationManager.AppSettings["ImpersonatedUserId"],
                                                            ConfigurationManager.AppSettings["AuthServer"], DsHelper.ReadFileContent(ConfigurationManager.AppSettings["PrivateKeyFile"]));

The read file definition:

internal static byte[] ReadFileContent(string path)
        {
            return File.ReadAllBytes(path);
        }

with the config file of entry of:

<add key="PrivateKeyFile" value="../../../private.key"/>

Within my project

byte[] l_PrivateKeyBytes = DocuSignV2.GetPrivateKeyBytes();

public static byte[] GetPrivateKeyBytes()
	{
	    return System.IO.File.ReadAllBytes(ConfigurationManager.AppSettings["DocuSignPrivateKeyFile"]);
	}

I use “l_PrivateKeyBytes” as the variable passed on “AuthenticateWithJwt”

The contents of this file is just the RSA Private Key provided within the Apps & Keys > Edit > Generate RSA
“
-----BEGIN RSA PRIVATE KEY-----
M…....l
-----END RSA PRIVATE KEY-----
”

Hello Daman,

You can check the walkthrough to set up authentication with JWT Below:
https://developers.docusign.com/docs/esign-rest-api/sdks/csharp/auth/

In case you still experience issues, you may need to capture error logs and open a ticket for the support team for further investigation.

Thanks,

Issue was solved. This issue ended up being a security protocol setting.

TLS 1.2+ was needed to be set.