We've decided to follow the Ethereum and blockchain principles here. Storing user data such as login and password would require a part of system - namely user's database being centralised - being governed by us. We don't want to do that.

We've decided it's enough that you get authorised by MetaMask to use our product.
Soon we'll be adding a feature where you could add some information to your blockchain address to introduce yourself and to make your offer more appealing to buyers but it won't be mandatory.

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