king on Nostr: 用户名是唯一的吗

{ "id": "c722e8e3cb29c6f59ee6e4bec9da0e7804340e0d8a502aa5b03edc2a28ead8e3", "pubkey": "6d80a1bf2bacf96d26657d2642468c62e32b30c5659c878b8b8f666aee9035ae", "created_at": 1675415493, "kind": 1, "tags": [ [ "e", "9265d15c8e2d788955fc624cc54c7c060e0ea8f0a8b991684eed789d7df445f4" ], [ "p", "6cdf59a69429378237b8b7177c8c2eeeebf7289f39fc33714d2d864623124f62" ] ], "content": "用户名是唯一的吗", "sig": "10108606daafaae49dcda15056732b1535eca3f1061ed9dbe39a5cf0dc6947c91d4dcc4856f4b3e6b557c277d028db87f4df37d8e1d012e8fc53ee967cfef607" }