Add FAQ around email uniquess and aliases

docs/FAQ.md

@@ -5,6 +5,16 @@ slug: /faq
 
 # FAQ
 
+### Can I sign up for Turnkey multiple times with the same email?
+
+When you authenticate to the Turnkey dashboard, your email is used to lookup your organization and your credential. Currently we do not allow multiple users to be associated with the same email address.
+
+### How do you recommend testing the Turnkey API and functionality safely?
+
+Typically we recommend that you create "test" organizations to test the API and functionality freely. When you are ready to go to production, use a "main" organization used for production only.
+
+To do this you can use email aliases: if `[email protected]` is your email, you can sign up for a new Turnkey organization with `[email protected]` to have a test playground. Reach out (<[email protected]>) if you need many test organizations or if you have specific question, our team is happy to help you get set up!
+
 ### Why do you require a public / private key pair to access Turnkey API?
 
 Asymmetric cryptography offers various security benefits to you: