Use etebase error codes for detecting login failures

resources/etesync/etesyncclientstate.cpp

@@ -83,6 +83,11 @@ bool EteSyncClientState::login(const QString &serverUrl, const QString &username
     mPassword = password;
 
     mClientXXX = etebase_client_new(QStringLiteral("Akonadi EteSync Resource"), mServerUrl);
+    if (!mClientXXX) {
+        qCDebug(ETESYNC_LOG) << "Could not initialise Etebase client";
+        qCDebug(ETESYNC_LOG) << "Etebase error" << etebase_error_get_message();
+        return false;
+    }
     mAccountXXX = etebase_account_login(mClientXXX.get(), mUsername, mPassword);
     if (!mAccountXXX) {
         qCDebug(ETESYNC_LOG) << "Could not fetch Etebase account";

resources/etesync/setupwizard.cpp

@@ -118,11 +118,11 @@ bool LoginPage::validatePage()
 {
     if (!mLoginResult) {
         qCDebug(ETESYNC_LOG) << "loginResult error" << mErrorCode;
-        if (mErrorCode == EteSyncErrorCode::ETESYNC_ERROR_CODE_UNAUTHORIZED || mErrorCode == EteSyncErrorCode::ETESYNC_ERROR_CODE_HTTP) {
+        if (mErrorCode == EtebaseErrorCode::ETEBASE_ERROR_CODE_UNAUTHORIZED) {
             mLoginLabel->setText(i18n("Incorrect login credentials. Please try again."));
-        } else if (mErrorCode == EteSyncErrorCode::ETESYNC_ERROR_CODE_ENCODING) {
+        } else if (mErrorCode == EtebaseErrorCode::ETEBASE_ERROR_CODE_URL_PARSE) {
             mLoginLabel->setText(i18n("Please ensure that the server URL is correct. The URL should start with http:// or https://."));
-        } else if (mErrorCode == EteSyncErrorCode::ETESYNC_ERROR_CODE_CONNECTION) {
+        } else if (mErrorCode == EtebaseErrorCode::ETEBASE_ERROR_CODE_CONNECTION) {
             mLoginLabel->setText(i18n("Could not connect to the server. Please ensure that the server URL is correct."));
         } else {
             mLoginLabel->setText(i18n(charArrFromQString(mErrorMessage)));