update STS examples to use latest v7 APIs

docs/sts/client-grants.go

@@ -20,6 +20,7 @@ package main
 
 import (
 	"bytes"
+	"context"
 	"crypto/tls"
 	"encoding/json"
 	"flag"
@@ -112,13 +113,13 @@ func main() {
 		log.Fatal(err)
 	}
 
-	clnt, err := minio.NewWithOptions(u.Host, opts)
+	clnt, err := minio.New(u.Host, opts)
 	if err != nil {
 		log.Fatal(err)
 	}
 
 	d := bytes.NewReader([]byte("Hello, World"))
-	n, err := clnt.PutObject("my-bucketname", "my-objectname", d, d.Size(), minio.PutObjectOptions{})
+	n, err := clnt.PutObject(context.Background(), "my-bucketname", "my-objectname", d, d.Size(), minio.PutObjectOptions{})
 	if err != nil {
 		log.Fatalln(err)
 	}

docs/sts/web-identity.go

@@ -221,13 +221,13 @@ func main() {
 			return
 		}
 
-		clnt, err := minio.NewWithOptions(u.Host, opts)
+		clnt, err := minio.New(u.Host, opts)
 		if err != nil {
 			log.Println(fmt.Errorf("Error while initializing Minio client, %s", err))
 			http.Error(w, err.Error(), http.StatusBadRequest)
 			return
 		}
-		buckets, err := clnt.ListBuckets()
+		buckets, err := clnt.ListBuckets(r.Context())
 		if err != nil {
 			log.Println(fmt.Errorf("Error while listing buckets, %s", err))
 			http.Error(w, err.Error(), http.StatusBadRequest)