s3: add account (#3753)

associate `Account` and `Identity` by accountId

weed/s3api/s3api_server.go

@@ -40,6 +40,7 @@ type S3ApiServer struct {
 	randomClientId int32
 	filerGuard     *security.Guard
 	client         *http.Client
+	accountManager *AccountManager
 }
 
 func NewS3ApiServer(router *mux.Router, option *S3ApiServerOption) (s3ApiServer *S3ApiServer, err error) {
@@ -59,6 +60,7 @@ func NewS3ApiServer(router *mux.Router, option *S3ApiServerOption) (s3ApiServer
 		filerGuard:     security.NewGuard([]string{}, signingKey, expiresAfterSec, readSigningKey, readExpiresAfterSec),
 		cb:             NewCircuitBreaker(option),
 	}
+	s3ApiServer.accountManager = NewAccountManager(s3ApiServer)
 	if option.LocalFilerSocket == "" {
 		s3ApiServer.client = &http.Client{Transport: &http.Transport{
 			MaxIdleConns:        1024,