From the link provided by the event, Login to your account with your email.
This will bring you to this page where you will select your team registering on the left. If you do not see your team on the left, you can search your team on the right. If nothing comes up in your search, the system will prompt you to create your team.
Now you will fill out the info asked by the event starting with the Update Profile Tab.
The following tab is the Team Information Tab. Fill out the info required and select "Save and Continue".
Note: Some event registrations may have a page labeled "Registration Form" in which they would like you to answer some questions about your team. If you do not see this page, just click "Continue". If you do happen to come across this page, answer the questions, then click "Save and Continue".
Fill out the information regarding Roster Review and select "Save and Continue" at the bottom.
Click the green "+" button, to add team officials to the event roster. Then click "Continue".
Continue with the Roster Review. Click the green "+" button to add players to the event roster. Then click "Continue".
Here you will select the correct Fee and click "Select"
On this page, you can select "checkout" you will be brought to a page that looks like this and once you click "Pay" your team will be registered for that league.