diff --git a/pkg/keychain/helper_darwin.go b/pkg/keychain/helper_darwin.go
index eed1e928..c82a4aed 100644
--- a/pkg/keychain/helper_darwin.go
+++ b/pkg/keychain/helper_darwin.go
@@ -31,7 +31,7 @@ const (
 )
 
 func init() { // nolint[noinit]
-	Helpers = make(map[string]helper)
+	Helpers = make(map[string]helperConstructor)
 
 	// MacOS always provides a keychain.
 	Helpers[MacOSKeychain] = newMacOSHelper
diff --git a/pkg/keychain/helper_linux.go b/pkg/keychain/helper_linux.go
index f099a555..d8d1cf1f 100644
--- a/pkg/keychain/helper_linux.go
+++ b/pkg/keychain/helper_linux.go
@@ -31,7 +31,7 @@ const (
 )
 
 func init() { // nolint[noinit]
-	Helpers = make(map[string]helper)
+	Helpers = make(map[string]helperConstructor)
 
 	if _, err := exec.LookPath("pass"); err == nil {
 		Helpers[Pass] = newPassHelper
diff --git a/pkg/keychain/helper_windows.go b/pkg/keychain/helper_windows.go
index b45677d6..96b3d038 100644
--- a/pkg/keychain/helper_windows.go
+++ b/pkg/keychain/helper_windows.go
@@ -25,7 +25,7 @@ import (
 const WindowsCredentials = "windows-credentials"
 
 func init() { // nolint[noinit]
-	Helpers = make(map[string]helper)
+	Helpers = make(map[string]helperConstructor)
 
 	// Windows always provides a keychain.
 	Helpers[WindowsCredentials] = newWinCredHelper
diff --git a/pkg/keychain/keychain.go b/pkg/keychain/keychain.go
index 3eb8e0a4..6729977a 100644
--- a/pkg/keychain/keychain.go
+++ b/pkg/keychain/keychain.go
@@ -28,8 +28,8 @@ import (
 	"github.com/docker/docker-credential-helpers/credentials"
 )
 
-// helper constructs a keychain helper.
-type helper func(string) (credentials.Helper, error)
+// helperConstructor constructs a keychain helperConstructor.
+type helperConstructor func(string) (credentials.Helper, error)
 
 // Version is the keychain data version.
 const Version = "k11"
@@ -39,7 +39,7 @@ var (
 	ErrNoKeychain = errors.New("no keychain") // nolint[noglobals]
 
 	// Helpers holds all discovered keychain helpers. It is populated in init().
-	Helpers map[string]helper // nolint[noglobals]
+	Helpers map[string]helperConstructor // nolint[noglobals]
 )
 
 // NewKeychain creates a new native keychain.
@@ -109,6 +109,7 @@ func (kc *Keychain) Delete(userID string) (err error) {
 	return kc.helper.Delete(kc.secretURL(userID))
 }
 
+// Get returns the username and secret for the given userID.
 func (kc *Keychain) Get(userID string) (string, string, error) {
 	kc.locker.Lock()
 	defer kc.locker.Unlock()