SQL DB Power Shell Connection Code error I don't understand - sql

Question

So I have a peice of code that I'm using to try to write to the database but I keep getting an error at the bottom that makes no sense. everything seems to work interdependantly but executing the code is just... no.
I pulled this db query ps code from
https://blogs.msdn.microsoft.com/buckwoody/2009/04/13/run-a-sql-server-command-from-powershell-without-the-sql-server-provider/
here is the code, the error is below the Close().
I'm totally lose. Help?
$strserver = "1sl-den-db03"
$strdatabase = "reporting"
$strusername = "belamiinc\PSscripts"
#you can get convert pass by "p#ssw0rdt3xt" | ConvertTo-SecureString -AsPlainText -Force | ConvertFrom-SecureString | Out-File "C:\Users\daniel.williams\Documents\Scriptcred.txt"
$strpassword = Get-Content "C:\Users\daniel.williams\Documents\Scriptcred.txt" | ConvertTo-SecureString
#$strQuery = "
#INSERT INTO EventLog (SourceID, Started, Completed, Result, Context, Machine)
#SELECT (50, null, null, 'error undefined query','query run outside of manufacturer','1sl-den-db03')
#"
$strQuery = "
insert into [reporting].[dbo].[password] (Username, Password)
select (test, testpw)
"
# Create and open a database connection
$sqlConnection = new-object System.Data.SqlClient.SqlConnection "server=$strserver;database=$strdatabase;Integrated Security=SSPI; User ID=$strusername; password=$strpassword"
#Create a command object
$sqlCommand = $sqlConnection.CreateCommand()
$sqlCommand.CommandText = $strQuery
$sqlConnection.Open()
#Execute the Command
$sqlCommand.ExecuteNonQuery()
$sqlConnection.Close()
The error is:
PS C:\Windows> Y:\DEPT - IT\Scripting\PSConnecttoSQL.ps1
Exception calling "ExecuteNonQuery" with "0" argument(s): "Incorrect syntax near ','."
At Y:\DEPT - IT\Scripting\PSConnecttoSQL.ps1:27 char:1
+ $sqlCommand.ExecuteNonQuery()
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : SqlException

Answer 1

You don't need a reader for an INSERT command. Change this line:
$sqlReader = $sqlCommand.ExecuteReader()
Into:
$sqlCommand.ExecuteNonQuery()
More about SqlCommand.ExecuteNonQuery()