meta mask logout must be checked.

if the internet connection drops or the network changes (was the case with one user) the meta mask session is closed and there is no more eth data.

if the metamask session is no longer there properly, it must be reacted to.

SQLSTATE[HY000]: General error: 1366 Incorrect integer value: '' for column 'player1' at row 1Array
(
    [query] => INSERT INTO `marble_battles` SET `battleHash` = :setv0, `c_date` = :setv1, `player1` = :setv2, `status` = :setv3
    [prepare] => Array
        (
            [setv0] => 3739bcb2-93bd-11eb-bcbe-901b0e968cb8
            [setv1] => 2021-04-02 16:10:44
            [setv2] => 
            [setv3] => 0
        )

)

#0 packages/quiqqer/utils/src/QUI/Database/DB.php(644): QUI\Database\DB->exec()
#1 packages/henbug/marble-dex/src/PCSG/MarbleDex/Battle/Factory.php(23): QUI\Database\DB->insert()
#2 packages/henbug/marble-dex/ajax/frontend/battle/start.php(13): PCSG\MarbleDex\Battle\Factory::create()
#3 packages/quiqqer/quiqqer/lib/QUI/Ajax.php(367): {closure}()
#4 packages/quiqqer/quiqqer/lib/QUI/Ajax.php(226): QUI\Ajax->callRequestFunction()
#5 packages/quiqqer/quiqqer/lib/ajax.php(106): QUI\Ajax->call()
#6 packages/quiqqer/quiqqer/ajax.php(16): require('/var/www/vhosts...')
#7 ajax.php(43): require('/var/www/vhosts...')
#8 {main}
{
    "request": "https:\/\/www.marble-cards.info\/ajax.php",
    "errorFilename": false,
    "userId": false,
    "username": "nobody",
    "IP": "14.192.214.113"
}