Question: How do I access the website for multiple squads?

Answer: Create a separate login for each squad on the website. An email address may be associated with one and only one squad, so you will need multiple email addresses. If you don't already have multiple addresses available to you, create a new email address somewhere. (I'll suggest gmail.com; it is free and works great).

If handling multiple email addresses is "problematic" for you, I'll suggest that you create a gmail.com account and have it forward all of your email to your preferred email address. If you choose this option, you'll never actually have to login to gmail other than to setup the account initially.