$serverAddress = "1.1.1.1"
$userName = "user"
$securePassword = ConvertTo-SecureString -AsPlainText -Force -String "password"
$credentials = New-Object -TypeName System.Management.Automation.PSCredential -ArgumentList $userName,$securePassword
$session = New-PSSession -ComputerName $serverAddress -Credential $credentials

Invoke-Command -Session $session -ScriptBlock {
    Write-Host "hello world"
}