diff --git a/ComunicMessages.pro b/ComunicMessages.pro
index 4e3bb21..96374cd 100644
--- a/ComunicMessages.pro
+++ b/ComunicMessages.pro
@@ -18,7 +18,11 @@ SOURCES += \
     controllers/initcontroller.cpp \
     data/conversation.cpp \
     helpers/conversationslisthelper.cpp \
-    widgets/conversationslistwidget.cpp
+    widgets/conversationslistwidget.cpp \
+    widgets/conversationitemwidget.cpp \
+    data/user.cpp \
+    helpers/usershelper.cpp \
+    data/conversationslist.cpp
 
 HEADERS += \
     helpers/accounthelper.h \
@@ -38,9 +42,14 @@ HEADERS += \
     controllers/initcontroller.h \
     data/conversation.h \
     helpers/conversationslisthelper.h \
-    widgets/conversationslistwidget.h
+    widgets/conversationslistwidget.h \
+    widgets/conversationitemwidget.h \
+    data/user.h \
+    helpers/usershelper.h \
+    data/conversationslist.h
 
 FORMS += \
     widgets/loginwidget.ui \
     widgets/mainwindow.ui \
-    widgets/aboutthisappdialog.ui
+    widgets/aboutthisappdialog.ui \
+    widgets/conversationitemwidget.ui
diff --git a/config.h b/config.h
index 63d7ccd..6e80e0d 100644
--- a/config.h
+++ b/config.h
@@ -15,6 +15,8 @@
 
 /**
  * API credentials
+ *
+ * Note : only HTTPS should be used in production
  */
 #define API_URL "https://api.communiquons.org/"
 #define API_SERVICE_NAME "ComunicAndroid"
diff --git a/data/conversationslist.cpp b/data/conversationslist.cpp
new file mode 100644
index 0000000..31e8570
--- /dev/null
+++ b/data/conversationslist.cpp
@@ -0,0 +1,17 @@
+#include "conversationslist.h"
+
+ConversationsList::ConversationsList()
+{
+
+}
+
+QList<int> ConversationsList::getAllMembersId() const
+{
+    QList<int> members;
+    for(Conversation conv : *this){
+        for(int memberID : conv.members())
+            if(!members.contains(memberID))
+                members.append(memberID);
+    }
+    return members;
+}
diff --git a/data/conversationslist.h b/data/conversationslist.h
new file mode 100644
index 0000000..b07bef4
--- /dev/null
+++ b/data/conversationslist.h
@@ -0,0 +1,28 @@
+/**
+ * Conversations list
+ *
+ * @author Pierre HUBERT
+ */
+
+#ifndef CONVERSATIONSLIST_H
+#define CONVERSATIONSLIST_H
+
+#include <QList>
+
+#include "conversation.h"
+
+class ConversationsList : public QList<Conversation>
+{
+public:
+    ConversationsList();
+
+    /**
+     * Get and return the ID of all the members of
+     * the conversations
+     *
+     * @return The IDs of the conversations
+     */
+    QList<int> getAllMembersId() const;
+};
+
+#endif // CONVERSATIONSLIST_H
diff --git a/data/user.cpp b/data/user.cpp
new file mode 100644
index 0000000..f27310d
--- /dev/null
+++ b/data/user.cpp
@@ -0,0 +1,46 @@
+#include "user.h"
+
+User::User()
+{
+
+}
+
+int User::iD() const
+{
+    return mID;
+}
+
+void User::setID(int iD)
+{
+    mID = iD;
+}
+
+QString User::firstName() const
+{
+    return mFirstName;
+}
+
+void User::setFirstName(const QString &firstName)
+{
+    mFirstName = firstName;
+}
+
+QString User::lastName() const
+{
+    return mLastName;
+}
+
+void User::setLastName(const QString &lastName)
+{
+    mLastName = lastName;
+}
+
+QString User::accountImage() const
+{
+    return mAccountImage;
+}
+
+void User::setAccountImage(const QString &accountImage)
+{
+    mAccountImage = accountImage;
+}
diff --git a/data/user.h b/data/user.h
new file mode 100644
index 0000000..1bb3db9
--- /dev/null
+++ b/data/user.h
@@ -0,0 +1,36 @@
+/**
+ * This object contains information about a single user
+ *
+ * @author Pierre HUBERT
+ */
+
+#ifndef USER_H
+#define USER_H
+
+#include <QString>
+
+class User
+{
+public:
+    User();
+
+    int iD() const;
+    void setID(int iD);
+
+    QString firstName() const;
+    void setFirstName(const QString &firstName);
+
+    QString lastName() const;
+    void setLastName(const QString &lastName);
+
+    QString accountImage() const;
+    void setAccountImage(const QString &accountImage);
+
+private:
+    int mID;
+    QString mFirstName;
+    QString mLastName;
+    QString mAccountImage;
+};
+
+#endif // USER_H
diff --git a/helpers/conversationslisthelper.cpp b/helpers/conversationslisthelper.cpp
index eb464be..963c265 100644
--- a/helpers/conversationslisthelper.cpp
+++ b/helpers/conversationslisthelper.cpp
@@ -4,6 +4,7 @@
 #include "conversationslisthelper.h"
 #include "apihelper.h"
 #include "../data/apirequest.h"
+#include "../data/conversationslist.h"
 
 ConversationsListHelper::ConversationsListHelper(QObject *parent) : QObject(parent)
 {
@@ -25,7 +26,7 @@ void ConversationsListHelper::getConvListCallback(int code, const QJsonDocument
     qobject_cast<APIRequest *>(sender())->deleteLater();
 
     if(code != 200){
-        emit onGotList(false, QList<Conversation>());
+        emit onGotList(false, ConversationsList());
         return;
     }
 
@@ -33,7 +34,7 @@ void ConversationsListHelper::getConvListCallback(int code, const QJsonDocument
     QJsonArray arr = document.array();
 
     //Process the list of conversations
-    QList<Conversation> list;
+    ConversationsList list;
     for(int i = 0; i < arr.size(); i++)
         list.append(GetConversationFromJson(arr.at(i).toObject()));
 
@@ -54,8 +55,9 @@ Conversation ConversationsListHelper::GetConversationFromJson(const QJsonObject
     //Process the list of members of the conversation
     QJsonArray members_arr = obj.value("members").toArray();
     QList<int> members_list;
-    for(int i = 0; i < members_arr.size(); i++)
-        members_list.append(members_arr.at(i).toInt());
+    for(int i = 0; i < members_arr.size(); i++){
+        members_list.append(members_arr.at(i).toString().toInt());
+    }
     conv.setMembers(members_list);
 
     return conv;
diff --git a/helpers/conversationslisthelper.h b/helpers/conversationslisthelper.h
index c6386d8..b28a52f 100644
--- a/helpers/conversationslisthelper.h
+++ b/helpers/conversationslisthelper.h
@@ -13,9 +13,11 @@
 
 #include "../data/conversation.h"
 
-class APIHelper;
 class QJsonObject;
 
+class APIHelper;
+class ConversationsList;
+
 class ConversationsListHelper : public QObject
 {
     Q_OBJECT
@@ -35,7 +37,7 @@ signals:
      * @param success TRUE for a success / FALSE else
      * @param list The list of conversations
      */
-    void onGotList(bool success, const QList<Conversation> &list);
+    void onGotList(bool success, const ConversationsList &list);
 
 public slots:
 
diff --git a/helpers/usershelper.cpp b/helpers/usershelper.cpp
new file mode 100644
index 0000000..baf302a
--- /dev/null
+++ b/helpers/usershelper.cpp
@@ -0,0 +1,55 @@
+#include <QJsonObject>
+
+#include "usershelper.h"
+#include "apihelper.h"
+
+UsersHelper::UsersHelper(QObject *parent) : QObject(parent)
+{
+    mAPIHelper = new APIHelper(this);
+}
+
+void UsersHelper::getList(QList<int> ids)
+{
+    APIRequest *request = new APIRequest(this);
+    request->setURI("user/getInfosMultiple");
+
+    QString ids_str;
+    for(int id : ids)
+        ids_str += QString::number(id) + ",";
+
+    request->addString("usersID", ids_str);
+    mAPIHelper->execute(request);
+
+    //Make connection
+    connect(request, &APIRequest::finished, this, &UsersHelper::getUsersInformationFinished);
+}
+
+void UsersHelper::getUsersInformationFinished(int code, const QJsonDocument &document)
+{
+    //Delete the request
+    qobject_cast<APIRequest *>(sender())->deleteLater();
+
+    //Check for error
+    if(code != 200){
+        emit onGotUsersInfo(false, QList<User>());
+        return;
+    }
+
+    //Parse the list of object
+    QList<User> list;
+    QJsonObject obj = document.object();
+    for(QString id : obj.keys())
+        list.append(ParseJSONToUser(obj.value(id).toObject()));
+
+    emit onGotUsersInfo(true, list);
+}
+
+User UsersHelper::ParseJSONToUser(const QJsonObject &obj)
+{
+    User user;
+    user.setID(obj.value("userID").toInt());
+    user.setFirstName(obj.value("firstName").toString());
+    user.setLastName(obj.value("lastName").toString());
+    user.setAccountImage(obj.value("accountImage").toString());
+    return user;
+}
diff --git a/helpers/usershelper.h b/helpers/usershelper.h
new file mode 100644
index 0000000..e6511b0
--- /dev/null
+++ b/helpers/usershelper.h
@@ -0,0 +1,69 @@
+/**
+ * Users helper
+ *
+ * It is used to get information about users
+ *
+ * @author Pierre HUBERT
+ */
+
+#ifndef USERSHELPER_H
+#define USERSHELPER_H
+
+#include <QObject>
+
+#include "../data/user.h"
+
+class QJsonObject;
+
+class APIHelper;
+
+class UsersHelper : public QObject
+{
+    Q_OBJECT
+public:
+    explicit UsersHelper(QObject *parent = nullptr);
+
+    /**
+     * Query information about a list of users
+     *
+     * @param ids The ID of the users to get
+     */
+    void getList(QList<int> ids);
+
+signals:
+
+    /**
+     * Signal emitted when we have got new users information
+     *
+     * @param success TRUE for a success / FALSE else
+     * @param list Information about the users
+     */
+    void onGotUsersInfo(bool success, const QList<User> &list);
+
+public slots:
+
+private slots:
+
+    /**
+     * Slot called once the API request to get users information has been finished
+     *
+     * @param code Result code of the operation (200 for a success)
+     * @param document Document
+     */
+    void getUsersInformationFinished(int code, const QJsonDocument &document);
+
+private:
+
+    /**
+     * Turn a JSON object into a User object
+     *
+     * @param obj The object to convert
+     * @return Generated user object
+     */
+    User ParseJSONToUser(const QJsonObject &obj);
+
+    //Private fields
+    APIHelper *mAPIHelper;
+};
+
+#endif // USERSHELPER_H
diff --git a/widgets/conversationslistwidget.cpp b/widgets/conversationslistwidget.cpp
index ff06ddf..5c60490 100644
--- a/widgets/conversationslistwidget.cpp
+++ b/widgets/conversationslistwidget.cpp
@@ -1,5 +1,9 @@
+#include <QMessageBox>
+
 #include "conversationslistwidget.h"
 #include "../helpers/conversationslisthelper.h"
+#include "../helpers/usershelper.h"
+#include "../data/conversationslist.h"
 
 ConversationsListWidget::ConversationsListWidget(QWidget *parent) :
     QWidget(parent)
@@ -7,6 +11,10 @@ ConversationsListWidget::ConversationsListWidget(QWidget *parent) :
     //Create conversations helper
     mConversationsList = new ConversationsListHelper(this);
     connect(mConversationsList, &ConversationsListHelper::onGotList, this, &ConversationsListWidget::onGotConversationsList);
+
+    //Create users helper
+    mUsersHelper = new UsersHelper(this);
+    connect(mUsersHelper, &UsersHelper::onGotUsersInfo, this, &ConversationsListWidget::onGotUsersInfo);
 }
 
 ConversationsListWidget::~ConversationsListWidget()
@@ -19,15 +27,26 @@ void ConversationsListWidget::refresh()
     mConversationsList->getList();
 }
 
-void ConversationsListWidget::onGotConversationsList(bool success, const QList<Conversation> &list)
+void ConversationsListWidget::onGotConversationsList(bool success, const ConversationsList &list)
 {
-    qWarning("Got conversations list (or failure).");
+    qWarning("Got conversations list callback.");
 
-    if(!success)
-        qWarning("Failure.");
-    else {
-        for(Conversation conv : list){
-            qWarning("Conv %d : %s", conv.iD(), conv.name().toStdString().c_str());
-        }
+    if(!success){
+        QMessageBox::warning(this, tr("Error"), tr("Could not get the list of conversations!"));
+        return;
     }
+
+    //Get the list of users
+    mUsersHelper->getList(list.getAllMembersId());
+}
+
+void ConversationsListWidget::onGotUsersInfo(bool success, const QList<User> &users)
+{
+    if(!success){
+        QMessageBox::warning(this, tr("Error"), tr("Could not get information about the members of the conversations!"));
+        return;
+    }
+
+    qDebug("Got the list of members of the conversations.");
+    //TODO : use ConversationItemWidget
 }
diff --git a/widgets/conversationslistwidget.h b/widgets/conversationslistwidget.h
index 80b25e3..7f86f2c 100644
--- a/widgets/conversationslistwidget.h
+++ b/widgets/conversationslistwidget.h
@@ -3,9 +3,11 @@
 
 #include <QWidget>
 
-#include "../data/conversation.h"
+#include "../data/conversationslist.h"
+#include "../data/user.h"
 
 class ConversationsListHelper;
+class UsersHelper;
 
 class ConversationsListWidget : public QWidget
 {
@@ -28,10 +30,22 @@ private slots:
      * @param success TRUE for a success / FALSE else
      * @param list The list of conversation (empty list in case of failure)
      */
-    void onGotConversationsList(bool success, const QList<Conversation> &list);
+    void onGotConversationsList(bool success, const ConversationsList &list);
+
+    /**
+     * This slot is triggered once we have information about the users
+     *
+     * @param success TRUE in case of success / FALSE else
+     * @param users The list of suers (empty list in case of failure)
+     */
+    void onGotUsersInfo(bool success, const QList<User> &users);
 
 private:
     ConversationsListHelper *mConversationsList;
+    UsersHelper *mUsersHelper;
+
+    //Current conversation in cache
+    ConversationsList mCurrList;
 };
 
 #endif // CONVERSATIONSLISTWIDGET_H