Opensea Plugin for buy/sell NFTs

Hi @cryptokid I was taking look into Moralis Opensea Plugin I need to integrate this plugin within my platform,
But I have question related to this like Can I use Moralis Plugin without Metamask Its because I have my own custom platform wallet where user can use to mint their nfts on my platform and my next approach is that by using Moralis Opensea Plugin there will be a direct buy/sell order on Opensea without using metamask. So is this possible that without using metamask can i utilise this Moralis Opensea Plugin ?