diff --git a/GPClient/CMakeLists.txt b/GPClient/CMakeLists.txt
index 4a172fa..366b0e6 100644
--- a/GPClient/CMakeLists.txt
+++ b/GPClient/CMakeLists.txt
@@ -96,6 +96,7 @@ target_link_libraries(gpclient
     Qt5::DBus
     QtSignals
     ${QTKEYCHAIN_LIBRARIES}
+    inih
 )
 
 if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 8.0 AND CMAKE_BUILD_TYPE STREQUAL Release)
diff --git a/GPClient/gatewayauthenticator.cpp b/GPClient/gatewayauthenticator.cpp
index 0d429a5..b7b4352 100644
--- a/GPClient/gatewayauthenticator.cpp
+++ b/GPClient/gatewayauthenticator.cpp
@@ -151,7 +151,7 @@ void GatewayAuthenticator::samlAuth(QString samlMethod, QString samlRequest, QSt
 {
     LOGI << "Trying to perform SAML login with saml-method " << samlMethod;
 
-    auto *loginWindow = new SAMLLoginWindow;
+    auto *loginWindow = new SAMLLoginWindow(gateway);
 
     connect(loginWindow, &SAMLLoginWindow::success, [this, loginWindow](const QMap<QString, QString> &samlResult) {
         this->onSAMLLoginSuccess(samlResult);
diff --git a/GPClient/portalauthenticator.cpp b/GPClient/portalauthenticator.cpp
index 6ba00ce..ef82d90 100644
--- a/GPClient/portalauthenticator.cpp
+++ b/GPClient/portalauthenticator.cpp
@@ -118,7 +118,7 @@ void PortalAuthenticator::samlAuth()
 {
     LOGI << "Trying to perform SAML login with saml-method " << preloginResponse.samlMethod();
 
-    auto *loginWindow = new SAMLLoginWindow;
+    auto *loginWindow = new SAMLLoginWindow(this->portal);
 
     connect(loginWindow, &SAMLLoginWindow::success, [this, loginWindow](const QMap<QString, QString> samlResult) {
         this->onSAMLLoginSuccess(samlResult);
diff --git a/GPClient/samlloginwindow.cpp b/GPClient/samlloginwindow.cpp
index d7b8d16..b5eccda 100644
--- a/GPClient/samlloginwindow.cpp
+++ b/GPClient/samlloginwindow.cpp
@@ -4,9 +4,10 @@
 #include <QWebEngineCookieStore>
 #include <plog/Log.h>
 
+#include "INIReader.h"
 #include "samlloginwindow.h"
 
-SAMLLoginWindow::SAMLLoginWindow(QWidget *parent)
+SAMLLoginWindow::SAMLLoginWindow(QString portal, QWidget *parent)
     : QDialog(parent)
     , webView(new EnhancedWebView(this))
 {
@@ -23,6 +24,9 @@ SAMLLoginWindow::SAMLLoginWindow(QWidget *parent)
     connect(webView, &EnhancedWebView::responseReceived, this, &SAMLLoginWindow::onResponseReceived);
     connect(webView, &EnhancedWebView::loadFinished, this, &SAMLLoginWindow::onLoadFinished);
 
+    // Portal
+    this->portal = portal;
+
     // Show the login window automatically when exceeds the MAX_WAIT_TIME
     QTimer::singleShot(MAX_WAIT_TIME, this, [this]() {
         if (failed) {
@@ -108,6 +112,8 @@ void SAMLLoginWindow::onLoadFinished()
 {
      LOGI << "Load finished " << webView->page()->url().toString();
      webView->page()->toHtml([this] (const QString &html) { this->handleHtml(html); });
+     QMap<QString, QString> credentials = this->loadCredentials();
+     webView->page()->runJavaScript("document.getElementById('username').value='" + credentials["username"] + "';");
 }
 
 void SAMLLoginWindow::handleHtml(const QString &html)
@@ -134,3 +140,25 @@ QString SAMLLoginWindow::parseTag(const QString &tag, const QString &html) {
     const QRegularExpression expression(QString("<%1>(.*)</%1>").arg(tag));
     return expression.match(html).captured(1);
 }
+
+QMap<QString, QString> SAMLLoginWindow::loadCredentials()
+{
+    std::string home = getenv("HOME");
+    std::string iniFile = home + "/.gpclient-credentials";
+    INIReader reader(iniFile);
+
+    QMap<QString, QString> credentials;
+    if (reader.ParseError() < 0) {
+        LOGE << "File '" << iniFile << "' not found.";
+        return credentials;
+    }
+
+    if (reader.HasSection(this->portal.toStdString())) {
+        credentials.insert(QString("username"), QString::fromStdString(reader.Get(this->portal.toStdString(), "username", "")));
+        credentials.insert(QString("password"), QString::fromStdString(reader.Get(this->portal.toStdString(), "password", "")));
+    } else {
+        LOGE << "No credentials found for '" << this->portal.toStdString() << "' in '" << iniFile << "'";
+    }
+
+    return credentials;
+}
\ No newline at end of file
diff --git a/GPClient/samlloginwindow.h b/GPClient/samlloginwindow.h
index 805368a..f02eefa 100644
--- a/GPClient/samlloginwindow.h
+++ b/GPClient/samlloginwindow.h
@@ -12,9 +12,10 @@ class SAMLLoginWindow : public QDialog
     Q_OBJECT
 
 public:
-    explicit SAMLLoginWindow(QWidget *parent = nullptr);
+    explicit SAMLLoginWindow(QString portal, QWidget *parent = nullptr);
 
     void login(const QString samlMethod, const QString samlRequest, const QString preloginUrl);
+    QMap<QString, QString> loadCredentials();
 
 signals:
     void success(QMap<QString, QString> samlResult);
@@ -31,6 +32,7 @@ private:
     bool failed { false };
     EnhancedWebView *webView { nullptr };
     QMap<QString, QString> samlResult;
+    QString portal;
 
     void closeEvent(QCloseEvent *event);
     void handleHtml(const QString &html);