To configure OAuth2 credentials:

1. Open your .env file
2. Uncomment and set the following variables:

OPENSKY_CLIENT_ID=your_client_id
OPENSKY_CLIENT_SECRET=your_client_secret

Or use environment variables:

export OPENSKY_CLIENT_ID=your_client_id
export OPENSKY_CLIENT_SECRET=your_client_secret

Test OAuth2 token generation:

export TOKEN=$(curl -X POST "https://auth.opensky-network.org/auth/realms/opensky-network/protocol/openid-connect/token" \
  -H "Content-Type: application/x-www-form-urlencoded" \
  -d "grant_type=client_credentials" \
  -d "client_id=$OPENSKY_CLIENT_ID" \
  -d "client_secret=$OPENSKY_CLIENT_SECRET" | jq -r .access_token)

echo "Token: $TOKEN"