Update plugin.go

Author: Ompragash

plugin.go

@@ -29,7 +29,6 @@ type Plugin struct {
 	AssumeRoleSessionName string
 	Bucket                string
 	UserRoleArn           string
-	UserRoleExternalID    string
 
 	// if not "", enable server-side encryption
 	// valid values are:
@@ -461,10 +460,19 @@ func (p *Plugin) createS3Client() *s3.S3 {
 		log.Warn("AWS Key and/or Secret not provided (falling back to ec2 instance profile)")
 	}
 
+	sess, err = session.NewSession(conf)
+	if err != nil {
+		log.Fatalf("failed to create AWS session: %v", err)
+	}
+
 	client := s3.New(sess, conf)
 
 	if len(p.UserRoleArn) > 0 {
-		// Create new credentials by assuming the UserRoleArn (with ExternalID when provided)
+		log.WithFields(log.Fields{
+			"UserRoleArn": p.UserRoleArn,
+		}).Info("Assuming user role ARN")
+
+		// Create new credentials by assuming the UserRoleArn with ExternalID
 		creds := stscreds.NewCredentials(sess, p.UserRoleArn, func(provider *stscreds.AssumeRoleProvider) {
 			if p.UserRoleExternalID != "" {
 				provider.ExternalID = aws.String(p.UserRoleExternalID)