Function Get-UserVariableAge{
Param(
    [Parameter(Mandatory=$true)]$Variablename
)
    If ([Environment]::GetEnvironmentVariable("$Variablename`_TimeSet","User"))
    {
        [datetime]$TimeSet = [Environment]::GetEnvironmentVariable("$Variablename`_TimeSet","User")
        $TimeSpan = New-TimeSpan -Start $TimeSet -End $(Get-Date)
    }else{
        $TimeSpan = $false
    }

    Return $TimeSpan
}

Function Delete-UserVariable{
Param(
    [Parameter(Mandatory=$true)]$Variablename
)
    [Environment]::SetEnvironmentVariable("$Variablename",$null, "User")
    [Environment]::SetEnvironmentVariable("$Variablename`_Timeset",$null, "User")
}

Function Get-IntensiveRefreshTime{
    Return 230
}

Function Get-UserVariable{
Param(
    #Set the env var name by default to use int but still make this function generic
    [Parameter(Mandatory=$true)]$Variablename,
    [Parameter(Mandatory=$true)]$Prompt,
    [Parameter()][switch]$Username,
    [Parameter()][switch]$Password,
    [Parameter()]$RefreshTime #delete the variable after X minutes
)
    If($Variablename -eq "intpassword"){
        $RefreshTime = Get-IntensiveRefreshTime
    }


    #delete the variable if its older then the refresh time
    $TimeSpan = Get-UserVariableAge -Variablename $Variablename
    if($TimeSpan.Minutes -gt $RefreshTime){
        Delete-UserVariable -Variablename $Variablename
    }
    
    If ([Environment]::GetEnvironmentVariable("$Variablename","User")){
        $var = [Environment]::GetEnvironmentVariable("$Variablename","User")
    }ELSE{

        #Prompt for user name
        $var = Read-Host $Prompt
                
        #if($password){
        #    $var = $var  | ConvertTo-SecureString 
        #}
        
        if($Username){
            #if the user entered the domain, split it on the \ so we just get the username
            If($var -like "*\*"){$var = $var.Split("\")[1]}
        }

        [Environment]::SetEnvironmentVariable("$Variablename",$var, "User")
        [Environment]::SetEnvironmentVariable("$($Variablename)`_TimeSet",$(Get-Date), "User")
    }

    Return $var
}

$IntUsername = Get-UserVariable -Variablename "IntUsername" -Prompt "Please enter your Intensive username" -Username
$Intpassword = Get-UserVariable -Variablename "Intpassword" -Prompt "Please enter your Intensive password" -Password