Get API key via basic auth. Curl.exe -u functionality

GetApiKey.ps1

function GetApiKey()
{
  Param(
    [Parameter(Mandatory=$false, Position=0, ValueFromPipeline=$false)]
    [ValidateNotNullOrEmpty()]
    [string] $userName,

    [Parameter(Mandatory=$false, Position=1, ValueFromPipeline=$false)]
    [SecureString] $useStaging
  )
  
  $plainPassword = (ConvertFrom-SecureString $password -AsPlainText)
  $pair = "$($userName):$($plainPassword)"

  $encodedCredentials = [System.Convert]::ToBase64String([System.Text.Encoding]::ASCII.GetBytes($pair))
  $basicAuthValue = "Basic $encodedCredentials"
  $headers = @{
      Authorization = $basicAuthValue
  }

  [string] $uri = "https://api.something.org/auth"

  $authResponse = Invoke-WebRequest -Uri $uri -Method GET -Headers $headers
  return $authResponse.Headers['X-Api-Key']
}