diff --git a/core/merginuserauth.cpp b/core/merginuserauth.cpp
index 6f37eaf67..b42879863 100644
--- a/core/merginuserauth.cpp
+++ b/core/merginuserauth.cpp
@@ -18,26 +18,26 @@ MerginUserAuth::MerginUserAuth( QObject *parent )
 
 void MerginUserAuth::clear()
 {
-  mUsername.clear();
-  mPassword.clear();
+  mUsername = "";
+  mPassword = "";
   mAuthToken.clear();
   mTokenExpiration = QDateTime();
   mUserId = -1;
 
 #if defined(Q_OS_ANDROID) || defined(Q_OS_IOS)
-  deleteKey( QStringLiteral( "username" ) );
-  deleteKey( QStringLiteral( "password" ) );
-  deleteKey( QStringLiteral( "userId" ) );
-  deleteKey( QStringLiteral( "token" ) );
-  deleteKey( QStringLiteral( "expire" ) );
+  deleteKey( "username" );
+  deleteKey( "password" );
+  deleteKey( "userId" );
+  deleteKey( "token" );
+  deleteKey( "expire" );
 #else
   QSettings settings;
-  settings.beginGroup( QStringLiteral( "Input/" ) );
-  settings.remove( QStringLiteral( "username" ) );
-  settings.remove( QStringLiteral( "password" ) );
-  settings.remove( QStringLiteral( "userId" ) );
-  settings.remove( QStringLiteral( "token" ) );
-  settings.remove( QStringLiteral( "expire" ) );
+  settings.beginGroup( "Input/" );
+  settings.remove( "username" );
+  settings.remove( "password" );
+  settings.remove( "userId" );
+  settings.remove( "token" );
+  settings.remove( "expire" );
   settings.endGroup();
 #endif
 
@@ -54,9 +54,9 @@ void MerginUserAuth::clearTokenData()
   deleteKey( QStringLiteral( "expire" ) );
 #else
   QSettings settings;
-  settings.beginGroup( QStringLiteral( "Input/" ) );
-  settings.remove( QStringLiteral( "token" ) );
-  settings.remove( QStringLiteral( "expire" ) );
+  settings.beginGroup( "Input/" );
+  settings.remove( "token" );
+  settings.remove( "expire" );
   settings.endGroup();
 #endif
 
@@ -85,20 +85,20 @@ void MerginUserAuth::saveAuthData()
 {
 #if defined(Q_OS_ANDROID) || defined(Q_OS_IOS)
   // mobile => QtKeychain
-  writeKey( QStringLiteral( "username" ), mUsername );
-  writeKey( QStringLiteral( "password" ), mPassword );
-  writeKey( QStringLiteral( "userId" ), mUserId );
-  writeKey( QStringLiteral( "token" ), mAuthToken );
-  writeKey( QStringLiteral( "expire" ), mTokenExpiration );
+  writeKey( "username", mUsername );
+  writeKey( "password", mPassword );
+  writeKey( "userId", mUserId );
+  writeKey( "token", mAuthToken );
+  writeKey( "expire", mTokenExpiration );
 #else
   // desktop => QSettings
   QSettings settings;
-  settings.beginGroup( QStringLiteral( "Input/" ) );
-  settings.setValue( QStringLiteral( "username" ), mUsername );
-  settings.setValue( QStringLiteral( "password" ), mPassword );
-  settings.setValue( QStringLiteral( "userId" ), mUserId );
-  settings.setValue( QStringLiteral( "token" ), mAuthToken );
-  settings.setValue( QStringLiteral( "expire" ), mTokenExpiration );
+  settings.beginGroup( "Input/" );
+  settings.setValue( "username", mUsername );
+  settings.setValue( "password", mPassword );
+  settings.setValue( "userId", mUserId );
+  settings.setValue( "token", mAuthToken );
+  settings.setValue( "expire", mTokenExpiration );
   settings.endGroup();
 #endif
 }
@@ -107,20 +107,20 @@ void MerginUserAuth::loadAuthData()
 {
 #if defined(Q_OS_ANDROID) || defined(Q_OS_IOS)
   // mobile => QtKeychain
-  readKey( QStringLiteral( "username" ), mUsername, []( const QString & v ) { return v; } );
-  readKey( QStringLiteral( "password" ), mPassword, []( const QString & v ) { return v; } );
-  readKey( QStringLiteral( "userId" ), mUserId, []( const QString & v ) { return v.toInt(); } );
-  readKey( QStringLiteral( "token" ), mAuthToken, []( const QString & v ) { return QByteArray::fromBase64( v.toUtf8() ); } );
-  readKey( QStringLiteral( "expire" ), mTokenExpiration, []( const QString & v ) { return QDateTime::fromString( v, Qt::ISODate ); } );
+  readKey( "username", mUsername, []( const QString & v ) { return v; } );
+  readKey( "password", mPassword, []( const QString & v ) { return v; } );
+  readKey( "userId", mUserId, []( const QString & v ) { return v.toInt(); } );
+  readKey( "token", mAuthToken, []( const QString & v ) { return QByteArray::fromBase64( v.toUtf8() ); } );
+  readKey( "expire", mTokenExpiration, []( const QString & v ) { return QDateTime::fromString( v, Qt::ISODate ); } );
 #else
   // desktop => QSettings
   QSettings settings;
-  settings.beginGroup( QStringLiteral( "Input/" ) );
-  mUsername = settings.value( QStringLiteral( "username" ) ).toString();
-  mPassword = settings.value( QStringLiteral( "password" ) ).toString();
-  mUserId = settings.value( QStringLiteral( "userId" ) ).toInt();
-  mTokenExpiration = settings.value( QStringLiteral( "expire" ) ).toDateTime();
-  mAuthToken = settings.value( QStringLiteral( "token" ) ).toByteArray();
+  settings.beginGroup( "Input/" );
+  mUsername = settings.value( "username" ).toString();
+  mPassword = settings.value( "password" ).toString();
+  mUserId = settings.value( "userId" ).toInt();
+  mTokenExpiration = settings.value( "expire" ).toDateTime();
+  mAuthToken = settings.value( "token" ).toByteArray();
   settings.endGroup();
 #endif
 }