Public/Crypto/Get-GistFiles.ps1

function Get-GistFiles {
  <#
    .SYNOPSIS
        Get gist Files
    .DESCRIPTION
        A longer description of the function, its purpose, common use cases, etc.
    .EXAMPLE
        $Name = "P0t4t0_ex.ps1"
        $params = @{
            UserName = '6r1mh04x'
            SecureToken = Read-Host -Prompt "Github Api Token" -AsSecureString
            GistId = '995856aa97ac3120cd8d92d2a6eac212'
        }
        $rawUrl = (Get-GistFiles @$params).Where({ $_.Name -eq $Name }).raw_url

        Using this function to Fetch raw_url of a private gist
    #>

  [OutputType([GistFile[]])]
  [CmdletBinding(DefaultParameterSetName = 'ClearT')]
  param (
    [Parameter(Position = 0, Mandatory = $true, ParameterSetName = '__AllParameterSets')]
    [Alias('UserName')]
    [string]$ownerID,

    [Parameter(Position = 1, Mandatory = $true, ParameterSetName = 'SecureT')]
    [ValidateNotNullOrEmpty()]
    [securestring]$SecureToken,

    [Parameter(Position = 1, Mandatory = $true, ParameterSetName = 'ClearT')]
    [ValidateNotNullOrEmpty()]
    [string]$GitHubToken,

    [Parameter(Position = 2, Mandatory = $true, ParameterSetName = '__AllParameterSets')]
    [ValidateNotNullOrEmpty()]
    [string]$GistId
  )

  begin {
    $gistFiles = $null;
  }

  process {
    $gistFiles = if ($PSCmdlet.ParameterSetName -eq 'ClearT') {
      Get-Gists -UserName $ownerID -GitHubToken $GitHubToken
    } else {
      Get-Gists -UserName $ownerID -SecureToken $SecureToken
    }
    $gistFiles = $gistFiles.Files.Where({
        $_.Id -eq $GistId
      }
    )
  }

  end {
    return $gistFiles
  }
}