Add the key file to your local app secrets
Your local Streamlit app will read secrets from a file .streamlit/secrets.toml in your app's root directory. Create this file if it doesn't exist yet and add the URL of your Google Sheet plus the content of the key file you downloaded to it as shown below:
```toml
.streamlit/secrets.toml
private_gsheets_url = "https://docs.google.com/spreadsheets/d/12345/edit?usp=sharing"
[gcp_service_account]
type = "service_account"
project_id = "xxx"
private_key_id = "xxx"
private_key = "xxx"
client_email = "xxx"
client_id = "xxx"
auth_uri = "https://accounts.google.com/o/oauth2/auth"
token_uri = "https://oauth2.googleapis.com/token"
auth_provider_x509_cert_url = "https://www.googleapis.com/oauth2/v1/certs"
client_x509_cert_url = "xxx"
```
Add this file to .gitignore and don't commit it to your Github repo!
