Fixed registration token (#1080)

src/bicep/add-ons/azure-virtual-desktop/modules/sessionHosts/virtualMachines.bicep

@@ -103,6 +103,11 @@ var pooledHostPool = (split(hostPoolType, ' ')[0] == 'Pooled')
 var sessionHostNamePrefix = replace(virtualMachineNamePrefix, serviceToken, '')
 var storageAccountToken = take('${storageAccountPrefix}??${uniqueToken}', 24)
 
+resource hostPool 'Microsoft.DesktopVirtualization/hostPools@2023-09-05' existing = {
+  name: hostPoolName
+  scope: resourceGroup(subscription().subscriptionId, resourceGroupControlPlane)
+}
+
 resource networkInterface 'Microsoft.Network/networkInterfaces@2020-05-01' = [for i in range(0, sessionHostCount): {
   name: '${replace(networkInterfaceNamePrefix, '-${serviceToken}', '')}-${padLeft((i + sessionHostIndex), 4, '0')}'
   location: location
@@ -324,7 +329,7 @@ resource extension_CustomScriptExtension 'Microsoft.Compute/virtualMachines/exte
       timestamp: timestamp
     }
     protectedSettings: {
-      commandToExecute: 'powershell -ExecutionPolicy Unrestricted -File Set-SessionHostConfiguration.ps1 -activeDirectorySolution ${activeDirectorySolution} -amdVmSize ${amdVmSize} -avdAgentBootLoaderMsiName "${avdAgentBootLoaderMsiName}" -avdAgentMsiName "${avdAgentMsiName}" -Environment ${environment().name} -fslogix ${deployFslogix} -fslogixContainerType ${fslogixContainerType} -hostPoolName ${hostPoolName} -HostPoolRegistrationToken "${reference(resourceId(resourceGroupControlPlane, 'Microsoft.DesktopVirtualization/hostpools', hostPoolName), '2019-12-10-preview').registrationInfo.token}" -imageOffer ${imageOffer} -imagePublisher ${imagePublisher} -netAppFileShares ${netAppFileShares} -nvidiaVmSize ${nvidiaVmSize} -pooledHostPool ${pooledHostPool} -storageAccountPrefix ${storageAccountPrefix} -storageCount ${storageCount} -storageIndex ${storageIndex} -storageService ${storageService} -storageSuffix ${storageSuffix} -uniqueToken ${uniqueToken}'
+      commandToExecute: 'powershell -ExecutionPolicy Unrestricted -File Set-SessionHostConfiguration.ps1 -activeDirectorySolution ${activeDirectorySolution} -amdVmSize ${amdVmSize} -avdAgentBootLoaderMsiName "${avdAgentBootLoaderMsiName}" -avdAgentMsiName "${avdAgentMsiName}" -Environment ${environment().name} -fslogix ${deployFslogix} -fslogixContainerType ${fslogixContainerType} -hostPoolName ${hostPoolName} -HostPoolRegistrationToken "${hostPool.listRegistrationTokens().value[0].token}" -imageOffer ${imageOffer} -imagePublisher ${imagePublisher} -netAppFileShares ${netAppFileShares} -nvidiaVmSize ${nvidiaVmSize} -pooledHostPool ${pooledHostPool} -storageAccountPrefix ${storageAccountPrefix} -storageCount ${storageCount} -storageIndex ${storageIndex} -storageService ${storageService} -storageSuffix ${storageSuffix} -uniqueToken ${uniqueToken}'
       managedidentity: {
         clientId: artifactsUserAssignedIdentityClientId
       }