Getting Content from a site after login

so i got powershell to launch my webpage, enter the username and password and then the site redirects to an url that uses sids after the url

How do i get powershell to grab the content after login

$Date = (Get-Date -format "yyyyMMdd")

$url = "https://iportalverizon.billmatrix.com/VerizonPortal/Login.aspx" 

$username="*" 

$password="*" 

$ie = New-Object -com internetexplorer.application; 

$ie.visible = $true; 

$ie.navigate($url);

while ($ie.Busy -eq $true) 

{ 

    Start-Sleep -Milliseconds 1000; 

} 

$ie.Document.getElementById("_ctl0_authentication_UserName").value = $username 

$ie.Document.getElementByID("_ctl0_authentication_Password").value=$password 

Import-Module WASP

$ie = Select-Window IEXPLORE | Set-WindowActive

$ie | Send-Keys "{TAB}"

$ie | Send-Keys "{TAB}"

$ie | Send-Keys "{TAB}"

$ie | Send-Keys "{TAB}"

$ie | Send-Keys "{TAB}"

$ie | Send-Keys "{TAB}"

$ie | Send-Keys "{TAB}"

$ie | Send-Keys "{ENTER}"