Google Photos Login/Logout 🔑

Every other node in the Google Photos Loader pack depends on one thing: a logged-in Google account. This node is how you log in, how you log out, and - most usefully - how you fix it when auth breaks. The README's own troubleshooting points here first: "If you encounter authentication issues, use the Login/Logout node to reset your authentication." If you install this pack, remember this node exists, because you will need it.

How it works

Google's OAuth 2.0, in the desktop-app flavor. Set the action to LOGIN and run; the pack reads your client_secrets.json, opens a browser window to Google's consent screen, and asks for photoslibrary.readonly scope. Note that scope: this pack can read your photos, and only read them. No uploads, no deletes, no album edits - the authorization literally won't permit it.

The token you get back is stored in the pack's folder as token.pickle, encrypted with a Fernet key kept in encryption_key.key. Every loader then loads that token, and when it expires, refreshes it automatically with Google. Set action to LOGOUT and run, and it deletes token.pickle - which is effectively "log out of the pack."

The inputs

• action (enum: NONE / LOGIN / LOGOUT, default NONE) - nothing happens until you pick one. NONE is the "leave me alone" setting, useful when the node is just sitting in a shared workflow.
• client_secrets_file (STRING) - path to your OAuth credentials, defaulting to client_secrets.json in the pack's own folder.

No outputs; it's an output node you trigger and forget.

Getting the credentials (the one-time setup)

This is the part nobody enjoys, but it's a one-off. In the Google Cloud Console:

1. Create a project (or pick one).
2. Enable the Google Photos Library API.
3. Create credentials → OAuth 2.0 Client ID → application type Desktop app.
4. Download the client config and save it as client_secrets.json inside the pack's folder (ComfyUI/custom_nodes/comfyui-google-photos-loader/).

Then run this node with LOGIN, approve in the browser, and you're set for months. The author has a video tutorial walking the whole thing.

How to install it

cd ComfyUI/custom_nodes
git clone https://github.com/lazniak/comfyui-google-photos-loader.git
pip install -r requirements.txt
# restart ComfyUI

Or ComfyUI Manager → "Google Photos Loader" (by PabloGFX) → Install → restart. No model downloads. Worth flagging: the code uses cryptography (for the token encryption), which isn't in requirements.txt - it usually arrives transitively via Google's auth stack, but if the import errors on a bare environment, pip install cryptography fixes it.

Troubleshooting

• No browser pops up on LOGIN → the classic causes: client_secrets.json is misnamed (it must have the "s" - the README is emphatic; Google's downloaded file may be client_secret.json), or it's not in the pack's folder, or it's the wrong client type (it must be "Desktop app", not "Web").
• Headless machine (Colab, remote server) → LOGIN starts a local server and opens a browser on the same machine. On a box with no browser you'll need port forwarding or an SSH tunnel to complete the callback.
• Logout doesn't fully log you out → it only deletes the local token file; the OAuth grant stays valid at Google until it expires. To sever access entirely, revoke the app in your Google account settings.
• Auth errors in loaders → run LOGOUT, then LOGIN again. That "reset" cycle is the pack's intended fix and clears most stale-token situations.