private string GenerateBasicAuthHeader(RunnerActionPluginExecutionContext executionContext, string accessToken)
{
// use basic auth header with username:password in base64encoding.
string authHeader = $"x-access-token:{accessToken}";
string base64encodedAuthHeader = Convert.ToBase64String(Encoding.UTF8.GetBytes(authHeader));
// add base64 encoding auth header into secretMasker.
executionContext.AddMask(base64encodedAuthHeader);
return($"basic {base64encodedAuthHeader}");
}