Here's a quick way to get your source Key USAepay account

First, log into your USAepay account and you'll land on your Dashboard.

Step 1: After login click on settings

Step 2: Now click on Source keys as shown in the image below.

 

 

Please copy the key selected and paste it in your Nexus app as shown below and click the next button on the right bottom corner of the screen.

 

Done!