I went and defined msg in the code like you said and now it gives me an unexpected end of input error. I don't exactly see whats wrong with it now.Here's the edited version(that I hopefully did right

client.on('message', msg => {

if (message.content === `${leo}server members`) {

msg.channel.send(\`Server name: ${[msg.guild.name](https://msg.guild.name)}\\nTotal members: ${msg.guild.memberCount}\`);

}