diff --git a/api/pool/pool.go b/api/pool/pool.go
index 091604c..dbaa126 100644
--- a/api/pool/pool.go
+++ b/api/pool/pool.go
@@ -8,9 +8,8 @@ import (
 	"sync"
 	"time"
 
-	"github.com/nspcc-dev/neofs-api-go/pkg/token"
-
 	"github.com/nspcc-dev/neofs-api-go/pkg/owner"
+	"github.com/nspcc-dev/neofs-api-go/pkg/token"
 	"github.com/pkg/errors"
 	"go.uber.org/atomic"
 	"go.uber.org/zap"
diff --git a/auth/errors.go b/auth/errors.go
deleted file mode 100644
index 4a0dab5..0000000
--- a/auth/errors.go
+++ /dev/null
@@ -1,17 +0,0 @@
-package auth
-
-import "fmt"
-
-const (
-	// Minimum length for MinIO access key.
-	accessKeyMinLen = 3
-
-	// Minimum length for MinIO secret key for both server and gateway mode.
-	secretKeyMinLen = 8
-)
-
-// Common errors generated for access and secret key validation.
-var (
-	ErrInvalidAccessKeyLength = fmt.Errorf("access key must be minimum %v or more characters long", accessKeyMinLen)
-	ErrInvalidSecretKeyLength = fmt.Errorf("secret key must be minimum %v or more characters long", secretKeyMinLen)
-)
diff --git a/cmd/gate/app-logger.go b/cmd/gate/app-logger.go
index b3ad7d4..fe772c2 100644
--- a/cmd/gate/app-logger.go
+++ b/cmd/gate/app-logger.go
@@ -3,11 +3,10 @@ package main
 import (
 	"strings"
 
-	"google.golang.org/grpc/grpclog"
-
 	"github.com/spf13/viper"
 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
+	"google.golang.org/grpc/grpclog"
 )
 
 type (
diff --git a/cmd/gate/app-settings.go b/cmd/gate/app-settings.go
index 6518c43..eb92491 100644
--- a/cmd/gate/app-settings.go
+++ b/cmd/gate/app-settings.go
@@ -14,7 +14,6 @@ import (
 	"time"
 
 	"github.com/nspcc-dev/neofs-authmate/accessbox/hcs"
-
 	crypto "github.com/nspcc-dev/neofs-crypto"
 	"github.com/nspcc-dev/neofs-s3-gate/api/pool"
 	"github.com/nspcc-dev/neofs-s3-gate/auth"