Powershell how to store and ID giving back from a post method - sql

Question

Okay i wrote the following code to post to an API. The API then returns back an ID that i need to store back into a database. How would i go in doing this i am so confused or is better to store it in memory? I feel that sending it back to sql will be much better. So to be clear again once i run the script i will get back a response back saying that it added what i wanted and it will give me back an ID basically tagging what was added. I need to grab that ID and send it back to a database simultaneously after it is added to the API
$DBServer = "xxxxx"
$DataBaseName = "xxxxxx"
$Connection = new-object system.data.sqlclient.sqlconnection #Set new object to connect to sql database
$Connection.ConnectionString ="server=$DBServer;database=$databasename;trusted_connection=True" # Connection string setting for local machine database with window authentication
Write-host "Connection Information:" -foregroundcolor yellow -backgroundcolor black
$Connection #List connection information to screen
$SqlCmd = New-Object System.Data.SqlClient.SqlCommand #setting object to use sql commands
############ MAIN ####################################
$SqlQuery = #"
SELECT [DeviceId]
,[DeviceName]
FROM [xxx].[dbo].[xxx]
order by 2
"#
$Connection.open()
Write-host "Connection to the $DatabaseName DB was successful." -foregroundcolor green -backgroundcolor black
$SqlCmd.CommandText = $SqlQuery
$SqlAdapter = New-Object System.Data.SqlClient.SqlDataAdapter
$SqlAdapter.SelectCommand = $SqlCmd
$SqlCmd.Connection = $Connection
$DataSet = New-Object System.Data.DataSet
$SqlAdapter.Fill($DataSet)
$Connection.Close()
###### Will Creds be required??
#Web Client connection
$WebClient = New-Object net.webclient
Add-Type -AssemblyName System.Web.Extensions
#Credentials
$userName ="xxxxxxx"
$password = "xxxxxxxx"
$pair = "$($userName):$($password)"
$encodedCreds = [System.Convert]::ToBase64String([System.Text.Encoding]::ASCII.GetBytes($pair))
$basicAuthValue = "Basic $encodedCreds"
$Headers = #{
Authorization = $basicAuthValue
}
#ConvertFromJson
$webclient.Credentials = new-object System.Net.NetworkCredential($username, $password)
foreach ($Row in $DataSet.Tables[0].Rows)
{
#Note sure of the URL at this point..
$URL = "https://xxxxxxxxx/xxxx/xx"
$Endpoint = "/devices.json/$($Row[0])/xxxxxxxxx"
$URLSvc = "$URL$Endpoint"
#write-host $URLSvc + " - " + $($Row[1])
########### TEST ####################
# Create JSON Hash
$JsonTemplate = ConvertTo-Json #{
"applicationName"= "xxx-$($Row[1])";
"applicationType"= "xxxxx";
"description1"= "xxxxx";
"description2"= "";
"passwordCompositionPolicyId"= "xxxxx"
}
## Write out for Display
#ConvertFromJson!!!!!!!!!!!!!!!!!!!!
Write-Host $JsonTemplate -foregroundcolor Red -backgroundcolor White
$xxx = Invoke-RestMethod -Method Post -Headers $Headers -Uri $URLSvc -Body $JsonTemplate -ContentType application/json
Write-Host $xxx
}