Fix Google Auth Mismatch

If you encounter server_error: Unable to exchange external code during Google Sign-In, it is 99% likely due to a Client Secret Mismatch between your local environment (.env.local) and the Supabase Dashboard.

This usually happens after:

Running setup-google-oauth.ts (which may create a new secret).
Rotated keys in Google Cloud Console.

Resolution Steps

1. Update Local Credentials

Run the helper script to securely update your local .env.local file with the correct Google Client Secret.

cd /Users/thelostunfounds/.gemini/antigravity/scratch/thelostandunfounds
npx tsx scripts/update-google-secret.ts

This script will prompt you to paste the secret (input is hidden) and save it correctly.

Fix Google Auth Mismatch

This usually happens after:

Running setup-google-oauth.ts (which may create a new secret).
Rotated keys in Google Cloud Console.

Resolution Steps

1. Update Local Credentials

Run the helper script to securely update your local .env.local file with the correct Google Client Secret.

cd /Users/thelostunfounds/.gemini/antigravity/scratch/thelostandunfounds
npx tsx scripts/update-google-secret.ts

This script will prompt you to paste the secret (input is hidden) and save it correctly.

Fix Google Auth

Fix Google Auth Mismatch

Resolution Steps

1. Update Local Credentials

Fix Google Auth

Fix Google Auth Mismatch

Resolution Steps

1. Update Local Credentials

2. Update Supabase Dashboard

3. Verification

Scripts

1password

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