Handling Supabase errors in SvelteKit

Hey folks,
I’m using Supabase with SvelteKit for auth and database operations.
Can you let me know if the code below is a good way to handle Supabase errors and show appropriate messages to users for common scenarios?

<script>
// u/ts-nocheck


    import { supabase } from "$lib/supabaseClient";


// u/ts-nocheck
    const AUTH_ERRORS = {
    '429': "You're moving a bit fast! Please wait a moment before trying again.",
    '422': "That email doesn't look quite right. Double-check it?",
    'network_error': "We're having trouble reaching our servers. Check your connection.",
    'default': "Something went wrong on our end. Please try again later."
    };
    let email=''
    let errMsg=''
    let successMsg=''
    try{
        const handleSubmit=async()=>{
        const {error}=await supabase.auth.signInWithOtp({
            email,
            options:{
                emailRedirectTo:`${window.location.origin}/callback`
            }
        })
        if(error){
            errMsg=AUTH_ERRORS[error.status] || AUTH_ERRORS['default']
            console.error("Supabase Error:", error)
            return
        }
        successMsg="Awesome, kinfdly check your email for the next steps!"
        email=''
    }
    }
    catch(err){
        console.error("Runtime Error", err)
        errMsg = "Connection failed. Please try again later.";
    }
</script>

Looking forward to suggestions !