refactor(server): relocate user.getPasswordHashAlgorithm (#4101)

Trivial code movement, no effective code changes.

internal/user/password_hashing_version.go

@@ -1,18 +1,4 @@
 package user
 
-import "github.com/pkg/errors"
-
 // defaultPasswordHashVersion is the default scheme used for user password hashing.
 const defaultPasswordHashVersion = ScryptHashVersion
-
-// getPasswordHashAlgorithm returns the password hash algorithm given a version.
-func getPasswordHashAlgorithm(passwordHashVersion int) (string, error) {
-	switch passwordHashVersion {
-	case ScryptHashVersion:
-		return scryptHashAlgorithm, nil
-	case Pbkdf2HashVersion:
-		return pbkdf2HashAlgorithm, nil
-	default:
-		return "", errors.Errorf("unsupported hash version (%d)", passwordHashVersion)
-	}
-}

internal/user/password_hashings.go

@@ -0,0 +1,15 @@
+package user
+
+import "github.com/pkg/errors"
+
+// getPasswordHashAlgorithm returns the password hash algorithm given a version.
+func getPasswordHashAlgorithm(passwordHashVersion int) (string, error) {
+	switch passwordHashVersion {
+	case ScryptHashVersion:
+		return scryptHashAlgorithm, nil
+	case Pbkdf2HashVersion:
+		return pbkdf2HashAlgorithm, nil
+	default:
+		return "", errors.Errorf("unsupported hash version (%d)", passwordHashVersion)
+	}
+}