GODT-2173: fix: Migrate Bridge password from v2.X.

internal/vault/helper.go

@@ -34,13 +34,11 @@ func getKeychainPrefPath(vaultDir string) string {
 }
 
 func GetHelper(vaultDir string) (string, error) {
-	filePath := getKeychainPrefPath(vaultDir)
-
-	if _, err := os.Stat(filePath); errors.Is(err, fs.ErrNotExist) {
+	if _, err := os.Stat(getKeychainPrefPath(vaultDir)); errors.Is(err, fs.ErrNotExist) {
 		return "", nil
 	}
 
-	b, err := os.ReadFile(filePath)
+	b, err := os.ReadFile(getKeychainPrefPath(vaultDir))
 	if err != nil {
 		return "", err
 	}

internal/vault/types_user.go

@@ -28,7 +28,7 @@ type UserData struct {
 	GluonKey    []byte
 	GluonIDs    map[string]string
 	UIDValidity map[string]imap.UID
-	BridgePass  []byte
+	BridgePass  []byte // raw token represented as byte slice (needs to be encoded)
 	AddressMode AddressMode
 
 	AuthUID string

internal/vault/user.go

@@ -99,11 +99,18 @@ func (user *User) SetAddressMode(mode AddressMode) error {
 	})
 }
 
-// BridgePass returns the user's bridge password (unencoded).
+// BridgePass returns the user's bridge password as raw token bytes (unencoded).
 func (user *User) BridgePass() []byte {
 	return user.vault.getUser(user.userID).BridgePass
 }
 
+// SetBridgePass saves bridge password as raw token bytes (unecoded).
+func (user *User) SetBridgePass(newPass []byte) error {
+	return user.vault.modUser(user.userID, func(data *UserData) {
+		data.BridgePass = newPass
+	})
+}
+
 // AuthUID returns the user's auth UID.
 func (user *User) AuthUID() string {
 	return user.vault.getUser(user.userID).AuthUID