> ## Documentation Index
> Fetch the complete documentation index at: https://docs.stigg.io/llms.txt
> Use this file to discover all available pages before exploring further.
# Provisioning customers
## Overview
In this quick start guide we'll demonstrate how to provision customers in Stigg.
**Customers** in Stigg should be provisioned when a customer is created in your application, for example: as part of your registration or onboarding process.
## Before we begin
In order to complete this guide in your application code, please make sure that you have:
* [Modeled your pricing in Stigg](/documentation/modeling-your-pricing-in-stigg/overview)
* [Installed the Stigg Node.js server SDK](/api-and-sdks/integration/backend/nodejs#installing-the-sdk)
* [A Stigg **full access** key](/api-and-sdks/integration/backend/nodejs#retrieving-the-full-access-key)
## Initializing the server SDK
The first step is to initialize Stigg's server SDK with the full access key of the environment that's integrated with Stigg:
```typescript TypeScript theme={null}
import Stigg from '@stigg/node-server-sdk';
const stiggClient = await Stigg.initialize({ apiKey: 'YOUR_FULL_ACCESS_KEY' });
export default stiggClient;
```
The Stigg SDK instance has an internal cache and supports retries for certain API calls on network errors. In general, you should initialize it once per process (for example: using a singleton design-pattern) and use the same instance throughout the codebase.
## Provision a customer
When a new customer is provisioned within your application (for example: as part of your registration or onboarding process), you should also provision them in Stigg.
You can optionally pass `subscriptionParams` to create subscription for that customer using a single operation. Doing so, will allow Stigg admins to override the requested subscription with no-code from the Stigg app using the [product's Customer Journey configuration](../../documentation/modeling-your-pricing-in-stigg/products#defining-the-customer-journey).
```typescript TypeScript theme={null}
const customer = await stiggClient.provisionCustomer({
customerId: 'test-customer-id',
name: 'John Doe',
email: 'john@example.com',
subscriptionParams: {
planId: 'plan-basic'
}
});
```
### Excluding customers from experiment
When running experiments, in some cases we would want to exclude customer from participating in the experiment. For example if we have a marketing campaign for new users that creates new subscriptions to specific plans. We will need to use the `excludeFromExperiment` flag. In case the flag is provided, customer will have the subscription according to the customer journey.
```typescript TypeScript theme={null}
const customer = await stiggClient.provisionCustomer({
customerId: 'test-customer-id',
name: 'John Doe',
email: 'john@example.com',
excludeFromExperiment: true,
subscriptionParams: {
planId: 'plan-basic'
}
});
```
## Additional resources