Import pfx file with sn.exe using powershell - powershell

Question

I am trying to install pfx file automatically every time the Azure Pipeline runs. Below is the powershell script i am trying to implement. I need it to provide the password automatically:
Set-Location "C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.6.1 Tools"
Start-Process -FilePath "sn.exe" -ArgumentList "-d",$container
Start-Sleep 2
Start-Process -FilePath ".\sn.exe" -ArgumentList "-i","c:\cert_2013.pfx",$container -NoNewWindow
Start-Sleep 2
[void] [System.Reflection.Assembly]::LoadWithPartialName("'System.Windows.Forms")
[System.Windows.Forms.SendKeys]::SendWait("$($CerPass){ENTER}")
Start-Sleep 2
[System.Windows.Forms.SendKeys]::SendWait("{ENTER}")
When the pipeline runs the ps1 file it is erroring out at SendWait("$($CerPass){ENTER}") Step. Below is the exact error message:
Enter the password for the PKCS#12 key file:
Could not read password for PKCS#12 blob in c:\cert_2013.pfx --
Console input may not be redirected for password entry.
Exception calling "SendWait" with "1" argument(s): "Access is denied"
At line:1 char:1
+ & 'C:\WINDOWS\System32\WindowsPowerShell\v1.0\powershell.exe' -NoLogo ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (Exception calli...cess is denied":String) [], RemoteException
+ FullyQualifiedErrorId : NativeCommandError
At C:\PowerShellScript\CertReInstall.ps1:18 char:46
+ [System.Windows.Forms.SendKeys]::SendWait("$($CerPass){ENTER}")
+ CategoryInfo : NotSpecified: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : Win32Exception
[error]Non-Zero exit code: '1' for ComputerName: 'PQAFCTC1'
[error]Atleast one remote job failed. Consult logs for more details. ErrorCodes(s): 'RemoteDeployer_NonZeroExitCode'
[section]Finishing: Run PowerShell on Target Machines
I need it to be automatically send the password to the file when installing. When i run the ps1 file directly on the server it works fine, but I need this script to be part of pipeline task (azure devops pipeline).
Any help would be greatly appreciated.
Thank you!