Private/Get-DuneAuthUrl.ps1

function Get-DuneAuthUrl {
    param(
        [Parameter(Mandatory)]
        [ValidateSet("Prod", "Dev","Test","Local")]
        [string]$DuneInstance
    )

    switch ($DuneInstance) {
        'Prod' { return 'https://duneframework.com/gui/authentication/login-minimized' }
        'Dev' { return 'https://dev.duneframework.com/gui/authentication/login-minimized' }
        'Test' { return 'https://test.duneframework.com/gui/authentication/login-minimized' }
        'Local' { return 'https://localhost:5001/gui/authentication/login-minimized' }
    }
}