How to use multi prefix in this code? I have tried various ways but nothing works.

let prefix = [ 'e', 'E' ];
        if (message.guild) {
            client.prefixes.ensure(message.guild.id, { prefix: 'e' });
            let guildPrefix = client.prefixes.get(message.guild.id, "e");

            prefix = guildPrefix ? guildPrefix : 'e';
        }   
        
        if(!(message.content.startsWith(prefix[0])||message.content.startsWith(prefix[1]))) { return; }

        const args = message.content.slice(prefix.length).trim().split(/ +/);

This is the code, its not work, i dont know why? can u help me guys? i use discord.js v13