If you have received an invitation to connect as a Plant Operator it means that a plant owner in Aquipa requires you to connect with them so that you can be booked for work with their plant.
If you don't have an Aquipa account your email invitation will prompt you to begin the account creation process so you can connect with the plant owner. Follow the prompts through the process that will include:
Creating an account
Upload any competencies that you currently hold
Confirm that you accept the invitation to connect with the plant owner
If you already have an account in Aquipa and the invite and been sent to you, you should see a banner requesting to connect with you at the top of your Aquipa account when logged in.