if (b == prefix + "changename") {
    let prefix = "$"; //pls change this prefix, if u using a new prefix
    const send = MPP.chat.send;
    let input = msg.a.substring(4).trim();
    let username = msg.p.name;
    if (input == "") return send(`Please enter name name to changename. Usage: ${prefix}changename. Your current name is ${username}`);
    MPP.client.sendArray([{m: "userset",set: {name: input}}]);
    send(`${username} changed his name to ${input}`);
}