# Common Workflows

### Adding a New User to a Tenant

{% stepper %}
{% step %}
Admin invites user: `POST /invite`
{% endstep %}

{% step %}
User receives email with invitation link
{% endstep %}

{% step %}
User clicks link: `GET /invitations/{token}/accept`
{% endstep %}

{% step %}
If new user: Set password via `POST /invitations/{token}/set-password`
{% endstep %}

{% step %}
User is added to tenant with specified role
{% endstep %}
{% endstepper %}

### Setting Up Billing

{% stepper %}
{% step %}
Create tenant: `POST /tenants`
{% endstep %}

{% step %}
Add payment method:

* Get setup intent: `POST /payments/setup-intent`
* Collect card with Stripe.js on frontend
* Attach payment method: `POST /payments/payment-methods`
  {% endstep %}

{% step %}
Create subscription: `POST /payments/subscription`
{% endstep %}

{% step %}
Subscription status updated via webhooks
{% endstep %}
{% endstepper %}

### Changing Subscription Plans

{% stepper %}
{% step %}
Get available plans: `GET /payments/plans`
{% endstep %}

{% step %}
Update subscription: \`PATCH /payments/subscription\` {%{% step %}

Stripe prorates the charges automatically
{% endstep %}

{% step %}
Webhook updates subscription status
{% endstep %}
{% endstepper %}

## Additional Resources

* **FastAPI Documentation:** <https://fastapi.tiangolo.com>
* **SQlAlchemy Documentation:** <https://www.sqlalchemy.org/>
* **Stripe API Reference:** <https://stripe.com/docs/api>
* **React Documentation:** <https://react.dev>
* **Tailwind CSS:** <https://tailwindcss.com>

## Support

For questions or issues, contact: <admin@fast-saas.com>


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