Our SMS addon allow defining the number of SMS credits that can be used per user. To perform that we use the Interspire groups.
Go to “Users &Groups” and select “Create a User Group”.
On the “Group Permission” enable SMS option, which will add the SMS settings at the end of the page.
At the bottom of the page you can define the number of SMS messages per user’s group. Bear in mind that the number of messages is not the same as Clickatell credits. You can find more information about Clickatell credits at http://www.clickatell.com/pricing-and-coverage/
Now, you only have to create a new user and assign to the new group with sms privileges.
On the top right corner you can see the number of available messages that user have.