

User (in Picasa Settings) - username which you are using for your gallery on Picasa Web Albums application (or user ID).Now you are in Category editing, here you set:

Go to Phoca Gallery - Categories, click on Create or Edit Category. Set album and load images into your Google Picasa Web Albums application (Album and images need to be accessible to public). If your server meets the requirements, go to Component - Phoca Gallery - Control Panel, click on Parameters and set Enable Picasa Image Loading parameter to Yes. Parameter allow_url_fopen enabled in PHP ini settings.PHP function json_decode enabled on your server (this function is included in PHP 5.2.0 or latest version).Google account with active Google Picasa Web Albums application, see.What are the requirements to display the albums: In Phoca Gallery you can display images from your Google Picasa Web Albums application. I, developer of Phoca Gallery search solution for this, but in case, it is not wanted to import images from Google Photos, it will be difficult to find some solution. But if you create the album now - in Google Photos, there is no way to make it public so such cannot be imported to Phoca Gallery. with help of Picasa or Google+), their images can be imported to Phoca Gallery.

So if you have created public albums in past (e.g. The problem is, for now, you cannot create public albums in Google Photos. You can import images from Google Photos, but they need to be stored in public albums. Picasa Web Albums service doesn't work anymore.
