curl https://api.geldstuck.com/v1/tenants/add-user-bulk \
-H "x-api-key: $GELDSTUCK_PUBLIC_KEY" \
-H "x-api-secret: $GELDSTUCK_SECRET_KEY" \
-H "Content-Type: application/json" \
-d '[
{ "name": "Alice", "email": "alice@example.com" },
{ "name": "Bob", "email": "bob@example.com" }
]'