This article is going to show you how to add and remove emergency contacts from the Alarm.com Web Browser and Alarm.com app

From the homes screen you will go to Setting on the left tab

Scroll down to Monitoring Station , and then Emergency Contacts

Here you can add a new contact or if you need to remove a contact you will press the arrow next to the contact. click Edit then Delete 

Steps are similar on the alarm.com app 

from the home screen click on More on the bottom right

Monitoring Settings> Emergency Contacts

 to add a contact

to delete a contact, click on the contact and click delete on the bottom