Simple way to get Auth Token?

Simple way to get Auth Token?

Hello, I am creating a PHP application where I first need to have a user login (verify they have a Zoho account so I should get their Auth Token)

I am having trouble understanding in the PHP example how I am supposed to call this:
https://accounts.zoho.com/apiauthtoken/nb/create?SCOPE=ZohoCRM/crmapi&EMAIL_ID=Zoho CRM Username or Email ID&PASSWORD=Your Zoho CRM Password


I am guessing I will need to use CURL 
and I will need to have the variables Username, Password, and Zoho CRM(which i am not sure what should be filled out exactly on this)

Is there just a simple existing PHP script that I can look at to see how I can send the request and receive the Token?

Thank you very much.