function addJoinAirdropQuest(address _addr) private
    {
        uint256 airdropGameId;    
        uint256 totalJoinAirdrop;
        (airdropGameId , totalJoinAirdrop) = getPlayerAirdropGameData(_addr);
        JoinAirdropQuest storage pQ = joinAirdropQuests[_addr];

        pQ.airdropGameId    = airdropGameId;
        pQ.totalJoinAirdrop = totalJoinAirdrop;
        pQ.ended = false;
    }