Provide user credentials when signing in

lib/helpers/users_helper.dart

@@ -20,7 +20,9 @@ class UsersHelper {
   Future<UsersList> _downloadInfo(List<int> users) async {
     // Execute the request
     final response = await APIRequest(
-        uri: "user/getInfoMultiple", args: {"usersID": users.join(",")}).exec();
+        uri: "user/getInfoMultiple",
+        needLogin: true,
+        args: {"usersID": users.join(",")}).exec();
 
     // Check if the request did not execute correctly
     if (response.code != 200) return null;
@@ -63,24 +65,22 @@ class UsersHelper {
   /// the server, otherwise cached data will be used if available
   Future<UsersList> getUsersInfo(List<int> users,
       {bool forceDownload = false}) async {
-
     List<int> toDownload = List();
     UsersList list = UsersList();
 
     // Check cache
-    for(int userID in users){
-      if(!forceDownload && await _usersDatabaseHelper.has(userID))
+    for (int userID in users) {
+      if (!forceDownload && await _usersDatabaseHelper.has(userID))
         list.add(await _usersDatabaseHelper.get(userID));
       else
         toDownload.add(userID);
     }
 
     // Process download if required
-    if(toDownload.length > 0) {
+    if (toDownload.length > 0) {
       final downloadedList = await _downloadInfo(toDownload);
 
-      if(downloadedList == null)
-        return null;
+      if (downloadedList == null) return null;
 
       list.addAll(downloadedList);
     }