Are you the administrator that needs to add additional users/subusers to your account? If so, it's pretty straightforward to get members of your team signed up and using the platform.
In your settings, there is a Corporate Admin section towards the bottom of the page. Feel free to click on this link to take you straight there: https://utilityapi.com/settings#corporate-admin
If you are creating the link for the first time, click on the option to "Create a Corporate Invite Link" then on the button prompt. This will create the link for you. Scroll back down to the bottom of the page to view your newly created link.
To send it out, click on the down arrow next to "Show" to view the link, and then just copy and paste it into an email to send to your team members. Once they click on the link, they will be prompted to create a new UtilityAPI account that will automatically be associated with your account. All billing will be handled at your account, and you will have the ability to see all data collected by your subusers.