Coinstore does not store your wallet password and cannot help you retrieve it. You can reset your wallet password by re-importing your wallet mnemonic or private key.
Please be sure to back up your wallet mnemonic or private key. If you forget your wallet password without backing up, you will not be able to retrieve your assets. Anyone who has your wallet mnemonic or private key can transfer your assets, so please keep your mnemonic or private key safe.