fix: typo and lint

auth/lib/models/code.dart

@@ -86,13 +86,13 @@ class Code {
   static Code fromRawData(String rawData) {
     Uri uri = Uri.parse(rawData);
     final issuer = _getIssuer(uri);
-    final digits = issuer.toLowerCase() == "stream" ? 5 : _getDigits(uri);
+    final digits = issuer.toLowerCase() == "steam" ? 5 : _getDigits(uri);
 
     try {
       return Code(
         _getAccount(uri),
         issuer,
-        _getDigits(uri),
+        digits,
         _getPeriod(uri),
         getSanitizedSecret(uri.queryParameters['secret']!),
         _getAlgorithm(uri),

auth/lib/utils/totp_util.dart

@@ -30,7 +30,7 @@ String getNextTotp(Code code) {
   return otp.OTP.generateTOTPCodeString(
     getSanitizedSecret(code.secret),
     DateTime.now().millisecondsSinceEpoch + code.period * 1000,
-    length: code.issuer.toLowerCase() == "stream" ? 5 : code.digits,
+    length: code.issuer.toLowerCase() == "steam" ? 5 : code.digits,
     interval: code.period,
     algorithm: _getAlgorithm(code),
     isGoogle: true,