add streamingcredentialsprovider in options

Author: ndyakov

options.go

@@ -13,6 +13,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/redis/go-redis/v9/auth"
 	"github.com/redis/go-redis/v9/internal/pool"
 )
 
@@ -74,6 +75,14 @@ type Options struct {
 	// There will be a conflict between them; if CredentialsProviderContext exists, we will ignore CredentialsProvider.
 	CredentialsProviderContext func(ctx context.Context) (username string, password string, err error)
 
+	// StreamingCredentialsProvider is used to retrieve the credentials
+	// for the connection from an external source. Those credentials may change
+	// during the connection lifetime. This is useful for managed identity
+	// scenarios where the credentials are retrieved from an external source.
+	//
+	// Currently, this is a placeholder for the future implementation.
+	StreamingCredentialsProvider auth.StreamingCredentialsProvider
+
 	// DB is the database to be selected after connecting to the server.
 	DB int
 

osscluster.go

@@ -14,6 +14,7 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/redis/go-redis/v9/auth"
 	"github.com/redis/go-redis/v9/internal"
 	"github.com/redis/go-redis/v9/internal/hashtag"
 	"github.com/redis/go-redis/v9/internal/pool"
@@ -66,11 +67,12 @@ type ClusterOptions struct {
 
 	OnConnect func(ctx context.Context, cn *Conn) error
 
-	Protocol                   int
-	Username                   string
-	Password                   string
-	CredentialsProvider        func() (username string, password string)
-	CredentialsProviderContext func(ctx context.Context) (username string, password string, err error)
+	Protocol                     int
+	Username                     string
+	Password                     string
+	CredentialsProvider          func() (username string, password string)
+	CredentialsProviderContext   func(ctx context.Context) (username string, password string, err error)
+	StreamingCredentialsProvider auth.StreamingCredentialsProvider
 
 	MaxRetries      int
 	MinRetryBackoff time.Duration
@@ -291,11 +293,12 @@ func (opt *ClusterOptions) clientOptions() *Options {
 		Dialer:     opt.Dialer,
 		OnConnect:  opt.OnConnect,
 
-		Protocol:                   opt.Protocol,
-		Username:                   opt.Username,
-		Password:                   opt.Password,
-		CredentialsProvider:        opt.CredentialsProvider,
-		CredentialsProviderContext: opt.CredentialsProviderContext,
+		Protocol:                     opt.Protocol,
+		Username:                     opt.Username,
+		Password:                     opt.Password,
+		CredentialsProvider:          opt.CredentialsProvider,
+		CredentialsProviderContext:   opt.CredentialsProviderContext,
+		StreamingCredentialsProvider: opt.StreamingCredentialsProvider,
 
 		MaxRetries:      opt.MaxRetries,
 		MinRetryBackoff: opt.MinRetryBackoff,