Function to convert a PSCredential to a Basic Auth encoded credential

ConvertTo-BasicAuth.ps1

function ConvertTo-BasicAuth {

    [cmdletbinding()]
    param (

        [Parameter( ValueFromPipeline )]
        [PSCredential]
        $Credential

    )

    $Username = $Credential.UserName
    $Password = $Credential.GetNetworkCredential().Password
    $AuthPair = $Username + ":" + $Password

    return ( [System.Convert]::ToBase64String( [System.Text.Encoding]::ASCII.GetBytes( $AuthPair )))

}