how to show only selected value in multiple select custom field

[Elzha Odie]

Hi, i have a problem when i want to show the selected value of my multiple select custom field in opsgenie.

first, i've already set the endpoint to get the value of multiple select 

and it return like this

how can i show two values above in opsgenie? thankyou so the output only Middleware / API (Apigee) and G-suites Mail only