Command role

client.on("message", message => {
  let cmd = message.content.toLowerCase().split(" ")[0];
  cmd = cmd.slice(prefix.length);
  if (cmd === "role") {
    if (!message.channel.guild || message.author.bot) return;
    let args = message.content.split(" ");
    let user = message.guild.member(
      message.mentions.users.first() || message.guild.members.cache.get(args[1])
    );
    var role = message.content
      .split(" ")
      .slice(2)
      .join(" ")
      .toLowerCase();
    var role1 = message.guild.roles.cache
      .filter(r => r.name.toLowerCase().indexOf(role) > -1)
      .first();
    if (!message.guild.member(client.user).hasPermission("MANAGE_ROLES"))
      return message.channel.send(`I Need Permissions !!`);
    if (!message.guild.member(message.author).hasPermission("MANAGE_ROLES"))
      return;
    if (!user)
      return message.channel.send(
        `**>>> ${prefix}role <@mention or iD> role**`
      );
    if (!role)
      return message.channel.send(
        `**>>> ${prefix}role <@mention or iD> role**`
      );
    if (!role1)
      return message.channel.send(
        `**>>> ${prefix}role <@mention or iD> role**`
      );
    if (user.roles.cache.find(c => c.id === role1.id))
      return user.roles
        .remove(role1)
        .then(() => {
          message.channel.send(
            `**>>> Role \`${role1.name}\` removed to ${user.user}**`
          );
        })
        .catch(err => message.channel.send("Error: **" + err.message + "**"));
    user.roles
      .add(role1)
      .then(() => {
        message.channel.send(
          `**>>> Role \`${role1.name}\` added to ${user.user}**`
        );
      })
      .catch(err => message.channel.send("Error: **" + err.message + "**"));
  }
  if (message.content.toLowerCase() === prefix + "help role") {
    let move = new Discord.MessageEmbed()
      .setTitle(`Command: role`)
      .addField("Usage", `${prefix}role @user role`)
      .addField("Information", "Change Roles");
    message.channel.send(move);
  }
});