Log into your Stripe account by going to https://dashboard.stripe.com/login and enter your username and password.
Navigate to your team's page within Stripe.
Click Business Settings from the menu on the left side.
Next, click Team
Select + New User from the top right-hand corner of the screen. Enter the email and user type (example: "Administrator") that you would like the user to be. Click "Invite".
IMPORTANT: The new user will receive an email to accept your invite to Stripe. They must accept this invitation to be added.