  function _unstake(uint32 poolId, address nft, uint256 tokenId, uint256 unstakeFine) internal virtual {
    UnstakeLocalVars memory vars;

>>  vars.yieldAccout = IYieldAccount(yieldAccounts[msg.sender]);
    require(address(vars.yieldAccout) != address(0), Errors.YIELD_ACCOUNT_NOT_EXIST);

  function _repay(uint32 poolId, address nft, uint256 tokenId) internal virtual {
    RepayLocalVars memory vars;

>>  vars.yieldAccout = IYieldAccount(yieldAccounts[msg.sender]);
    require(address(vars.yieldAccout) != address(0), Errors.YIELD_ACCOUNT_NOT_EXIST);
+ function _unstake(uint32 poolId, address nft, address user, uint256 tokenId, uint256 unstakeFine) internal virtual {
    UnstakeLocalVars memory vars;

+   vars.yieldAccout = IYieldAccount(yieldAccounts[user]);
+   require(user == msg.sender || botAdmin == msg.sender, 
Errors.INVALID_CALLER);
    require(address(vars.yieldAccout) != address(0), Errors.YIELD_ACCOUNT_NOT_EXIST);
