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Firebase Admin SDK Setup for Backend

To fix the "Default Firebase app does not exist" or "Invalid token" errors, you must configure the Firebase Admin SDK.

CRITICAL: You need the "serviceAccountKey.json" file.

  1. Go to Firebase Console: https://console.firebase.google.com/
  2. Select your project ("alysa-speak" or similar).
  3. Click the Gear Icon (Project Settings) > Service accounts.
  4. Click Generate new private key.
  5. This will download a JSON file.

How to install it:

Option A (Recommended):

  1. Rename the downloaded file to serviceAccountKey.json.
  2. Move it into the alysa-engine/ folder (next to app.py and requirements.txt).
  3. Restart your backend (python app.py or flask run). The app will auto-detect it.

Option B (Environment Variable):

  1. Save the file anywhere.
  2. In alysa-engine/.env, set: 
    FIREBASE_CREDENTIALS_PATH=/absolute/path/to/your/file.json
  3. Restart your backend.

Verification: When you start the backend, you should see: Firebase Admin SDK initialized with credentials from: ... If you see "CRITICAL ERROR", read the error message to see what went wrong.