Welcome to the unknown instance of Mastodon that y2ji,Inc manages the business. Please stop using recycled password in this instance and others. Because using recycled password is very dangerous.
And, Mastodon is a free, open-source social network. A decentralized alternative to commercial platforms, it avoids the risks of a single company monopolizing your communication. Pick a server that you trust — whichever you choose, you can interact with everyone else. Anyone can run their own Mastodon instance and participate in the social network seamlessly.