To enable the upload to Google Photos functionality:

• Go to the Google Cloud Platform developer console
• Create a new project
• You will be redirected to the first page, here select the newly created project from the dropdown on the top left
• Select the OAuth consent screen from the left sidebar menu
• Select External and continue
• On the next screen only fill in a name for the application and click save
• Select the Credentials from the left sidebar menu
• Click Create credentials from the top and select OAuth Client ID from the dropdown options
• Select web application, give it a name and fill in the callback URLs with: http:https://localhost:8080 for the first and http:https://localhost:8080/oauth2-callback for the second entry (make sure the press return/enter to submit the values, as multiple ones are possible), then click create at the bottom of the page
• Copy your Client ID and Client secret and store them safely
• Open your config.json, and add a googlePhotos object as described in the table above
• Start your Homebridge instance, it will print out an url, open it in a browser and follow the login instructions
• The page where you will be redirected will display an error unless you are running Homebridge on the same machine as you are running the browser
• Copy the full url, replace the localhost (if Homebridge is not running on your current machine) in the address bar with the ip-address of your Homebridge device, visit the page, you should get the following message: OAuth2 callback handled!
• You are now authenticated, and the refresh token has been saved to the previously created config file.
• The plugin will then create an album named Homebridge-Unifi-Protect-Motion-Captures, it will also store the ID of this album so the next time it is not created again (you can rename this album to anything you want)
• Any detected motions (both normal and enhanced) will now be uploaded to the newly created album