diff --git a/api/middleware/auth.go b/api/middleware/auth.go
index 2f5381f..08e3d75 100644
--- a/api/middleware/auth.go
+++ b/api/middleware/auth.go
@@ -72,6 +72,7 @@ func Auth(center Center, log *zap.Logger) Func {
 				if box.AccessBox.Gate.BearerToken != nil {
 					reqInfo.User = bearer.ResolveIssuer(*box.AccessBox.Gate.BearerToken).String()
 				}
+				reqLogOrDefault(ctx, log).Debug(logs.SuccessfulAuth, zap.String("accessKeyID", box.AuthHeaders.AccessKeyID))
 			}
 
 			h.ServeHTTP(w, r.WithContext(ctx))
diff --git a/internal/logs/logs.go b/internal/logs/logs.go
index 42b9cda..0561b4a 100644
--- a/internal/logs/logs.go
+++ b/internal/logs/logs.go
@@ -146,4 +146,5 @@ const (
 	BucketOwnerKeyIsMissing                              = "bucket owner key is missing"
 	SettingsNodeInvalidOwnerKey                          = "settings node: invalid owner key"
 	FailedToSendTransaction                              = "failed to send transaction"
+	SuccessfulAuth                                       = "successful auth"
 )