foo.ps1

$rawGames = $PlayniteApi.Database.Games

$count = $PlayniteApi.Database.Games.Count
[System.Collections.ArrayList]$games = @()
foreach ($game in $rawGames) {
    if ($game.Source.Name) {
        $gameObj = @{
            "name" = $game.Name # adding the game name to the JSON breaks things
            "store" = $game.Source.Name
        }

        $games.Add($gameObj)
    }
}

$payload = @{
    "count" = $count
    "games" = $games
}

$json = $payload | ConvertTo-Json -Compress

$headers = @{
    "Accept" = "application/vnd.github.v3+json"
    "Content-Type" = "application/json"
    "Authorization" = "token $token"
    "Charset" = "UTF-8"
}

$body = @{
    "description" = "PlayniteGistLib"
    "public" = $True
    "files" = @{
        "library.json" = @{
            "filename" = "library.json"
            "content" = $json
        }
    }
} | ConvertTo-Json -Compress

$response = Invoke-WebRequest -Method "POST" -Headers $headers -Body $body -Uri "https://api.github.com/gists"