Answers for "how to count user with specific role in discord js"

get discord.js role

let role = message.guild.roles.cache.find(r => r.id === "Role ID");

// The member you want to add the role to
let member = message.mentions.members.first();

// Add role to the member
member.roles.add(role);

// Or add it to yourself
message.author.roles.add(role);

discord js user has role

if(message.member.roles.find(r => r.name === "Admin")){
    // The rest of your code.
}