Not getting error `User already registered` when using `await supabase.auth.signUp`

export const signUp = async (email: string, password: string, first_name: string, last_name: string) => {
    return await supabase.auth.signUp({
        email: email,
        password: password,
        options: {
            data: {
                first_name,
                last_name,
            },
            emailRedirectTo: getUrl(),
        },
    })
}