function addDepositor(address _depositor) external onlyOwner {
    isDepositor[_depositor] = true;
}
function deposit(address _recipient, uint _pid, uint _amount) external nonReentrant onlyDepositor {
    PoolInfo storage pool = poolInfo[_pid];
    UserInfo storage user = userInfo[_pid][_msgSender()];
    updatePool(_pid);
    
    if(user.amount > 0) {  
        uint pending = user.amount * pool.accConcurPerShare / _concurShareMultiplier - user.rewardDebt;
        if (pending > 0) {
            safeConcurTransfer(_recipient, pending);
        }
    }

    if (_amount > 0) {
        if (pool.depositFeeBP > 0) {
            uint depositFee = _amount.mul(pool.depositFeeBP).div(_perMille);
            user.amount = SafeCast.toUint128(user.amount + _amount - depositFee);
        } else {
            user.amount = SafeCast.toUint128(user.amount + _amount);
        }
    }     

    user.rewardDebt = SafeCast.toUint128(user.amount * pool.accConcurPerShare / _concurShareMultiplier);
    emit Deposit(_recipient, _pid, _amount);
}
