创建并连接数据库，并修改登录和注册接口

node_modules/mysql2/lib/packets/reset_connection.js

@@ -0,0 +1,17 @@
+'use strict';
+
+const Packet = require('../packets/packet');
+const CommandCodes = require('../constants/commands');
+
+class ResetConnection {
+  constructor() {}
+
+  toPacket() {
+    const packet = new Packet(0, Buffer.alloc(5), 0, 5);
+    packet.offset = 4;
+    packet.writeInt8(CommandCodes.RESET_CONNECTION);
+    return packet;
+  }
+}
+
+module.exports = ResetConnection;