Get user list from shared Apps from Powerbi Rest API using Powershell

Hi,

I have tried to get all the users that have access to reports workspaces and Apps. Used the below code to get users that are in the workspace. But this code doesn't return the users that the dashboard shared as an APP. How should I get this information using Power BI REST API. Please help.

$Groups = Get-PowerBIWorkspace -All | SORT @{Expression="Type"; Descending=$True}, Name

##Get workspaces that are not deleted
$Groups = $Groups | SELECT Id, Name, Type, State | WHERE State -NE 'Deleted'
$GroupWorkspaces = $Groups | WHERE Type -eq 'Workspace'

##Make a global variable for keeping all the workspace information
$WorkspaceUsers = @()
## Clear variable for release all the session values
clear-variable -name WorkspaceUsers

##Start the looping statement for all workspaces
foreach ($GroupWorkspaceId in $GroupWorkspaces.Id) {
    #Retrieving workspace object from group id
    $WorkspaceObject = Get-PowerBIWorkspace -Id $GroupWorkspaceId
    $pbiURL = "https://api.powerbi.com/v1.0/myorg/groups/$GroupWorkspaceId/users"
#****************
#------------------------------------------------------
# --> API Call for WORKSPACE USERS  
#------------------------------------------------------ 
    ## API call for returning a list of users that have access to the specified workspace.
    $resultJson = Invoke-PowerBIRestMethod –Url $pbiURL –Method GET
)