Navigate to https://app.sheepcrm.com
Choose Get Access.
The Sheep App is for individual users, if you have a username and password for SheepCRM (the management app) then you will still need to register, you existing password will not work.
Your email address will be your username, pick a good password. Read the terms and if you are happy tick the box and click Register
Sheep secret code
You should have an email from Sheep with a one-time code. This code is valid for 24 hours. The code is used to prove that you have access to the email address that you registered.
Click the blue 'Activate Now' button or paste the code into the activation page.