fix error when token is null, add custom logger instance

lib/log/log.dart

@@ -0,0 +1,38 @@
+import 'package:logger/logger.dart';
+
+class Log {
+  static final _verbolg = Logger();
+  static final _linelg = Logger(
+    printer: PrettyPrinter(methodCount: 0, printEmojis: false),
+  );
+
+  /// Log a message at level [Level.verbose].
+  static void v(dynamic message, [dynamic error, StackTrace? stackTrace]) {
+    _linelg.log(Level.verbose, message, error, stackTrace);
+  }
+
+  /// Log a message at level [Level.debug].
+  static void d(dynamic message, [dynamic error, StackTrace? stackTrace]) {
+    _linelg.log(Level.debug, message, error, stackTrace);
+  }
+
+  /// Log a message at level [Level.info].
+  static void i(dynamic message, [dynamic error, StackTrace? stackTrace]) {
+    _linelg.log(Level.info, message, error, stackTrace);
+  }
+
+  /// Log a message at level [Level.warning].
+  static void w(dynamic message, [dynamic error, StackTrace? stackTrace]) {
+    _verbolg.log(Level.warning, message, error, stackTrace);
+  }
+
+  /// Log a message at level [Level.error].
+  static void e(dynamic message, [dynamic error, StackTrace? stackTrace]) {
+    _verbolg.log(Level.error, message, error, stackTrace);
+  }
+
+  /// Log a message at level [Level.wtf].
+  static void wtf(dynamic message, [dynamic error, StackTrace? stackTrace]) {
+    _verbolg.log(Level.wtf, message, error, stackTrace);
+  }
+}