update changelog + cleanup comments

Author: sachaarbonel

example/lib/main.dart

@@ -12,10 +12,7 @@ void main() {
   const _key = String.fromEnvironment('key');
   const _userToken = String.fromEnvironment('user_token');
 
-  final client = StreamFeedClient(
-    _key,
-    // token: const Token(_userToken),
-  );
+  final client = StreamFeedClient(_key);
 
   runApp(
     MyApp(

packages/stream_feed/CHANGELOG.md

@@ -1,3 +1,23 @@
+## 0.5.0: 12/01/2022
+
+- BREAKING: we no longer accept a token in the constructor. This change is inspired by Stream Chat, and allows for use cases like multi account management. It allows to instantiate `StreamFeedClient` at the top of your widget tree for example, and connecting the user later.
+  
+```diff
+-  client = StreamFeedClient(apiKey, token: frontendToken);
++  client = StreamFeedClient(apiKey);
++
++  await client.setUser(
++    const User(
++      data: {
++        'name': 'John Doe',
++        'occupation': 'Software Engineer',
++        'gender': 'male'
++      },
++    ),
++    frontendToken,
++  );
+```
+  
 ## 0.4.0+3: 27/12/2021
 
 - fix: call profile in setUser, so that currentUser data is not null

packages/stream_feed/example/main.dart

@@ -86,7 +86,6 @@ Future<void> main() async {
 // Client-side
   client = StreamFeedClient(
     apiKey,
-    // token: userToken,
     appId: appId,
   );
 
@@ -339,7 +338,7 @@ Future<void> main() async {
         object: cheeseBurgerRef,
       ));
 
-  client = StreamFeedClient(apiKey); //token: frontendToken TODO: setUser
+  client = StreamFeedClient(apiKey);
 // ensure the user data is stored on Stream
   await client.setUser(
     const User(