Document format :

{
    id: '{UUID}', // PRIMARY
    included: '{bool}',
    user_id: '{userID}', // SECONDARY INDEX
    game_account_info: '{object with account IDs}'
    game_id: '{gameID}', // SECONDARY INDEX
    verified: '{verifiedBOOL}',
    created: '{timestamp}', // SECONDARY INDEX
    settings: {'Object with settings'}
}

Example :

{
    id: 'f4e81a0e-f5e8-4eb3-bf95-c5203e1d87b9',
    included: true,
    user_id: '8a766142-be00-4661-abeb-a9e3e912dc05',
    game_account_info: {
        account_id: "8fqSAx6veh0g6paaP_mMtBCaE_Ae5ijAcBE_Q6tXwp7FSA",
        puuid: "uSNpdartPQ8HIT_KhJTutWJxXzXYLgn2KQTTzDknruVZM5rz8KXmy2WePsdsuj8DhFJ-p5mpQM4z9w",
        region: "euw",
        summoner_id: "Y-ZlcXwYKQmX8Wbrb6atVYffDmdWNx5ZKGg8AtsT5Oy_7cg"
    },
    game_id: 'lol',
    verified: true,
    created: 1519639337231,
    settings: {
        username: 'iFonny',
        region: 'euw'
    }
}