Swagger doc: array input needed

Product: PowerShell Universal
Version: 4.5.3

I have an API that takes [string [ `] ] $OwnerUPN as input. I defined the docstring above the API to for it to generate a swagger doc. However, on the swaggerUI, this parameter takes a string input instead of an array input.
example: if passed upn1,upn2
via swagger it sends “upn1,upn2” instead of “upn1”,“upn2”
is there any documentation to define the schema of swagger? Thank you :slight_smile:

.PARAMETER OwnerUPN
The User Principal Name (UPN) of one or more owners of the app. 
...
param (
    
    [Parameter(Mandatory)]
    [ValidatePattern('^[a-zA-Z0-9._%+-]+@($')]
    [ValidateNotNullorEmpty()]
    [string[]]$OwnerUPN,

)