- Add the following property to your configuration file:

- `applications.properties` file

```properties

paystack-client.secret-key=INPUT_YOUR_PAYSTACK_SECRET_KEY_HERE

paystack-client.definition-type=(REACTIVE|NON_REACTIVE) #This property is optional, it defaults to 'NON_REACTIVE' if not specified

paystack-client.activate-only-clients=apple_pay, customer, plan, transaction #Used to specify only the clients you want to be initialized

```

- `applications.yaml` file

```yaml

paystack-client:

secret-key: INPUT_YOUR_PAYSTACK_SECRET_KEY_HERE

definition-type: (REACTIVE|NON_REACTIVE) #This property is optional, it defaults to 'NON_REACTIVE' if not specified

activate-only-clients: apple_pay, customer, plan, transaction #This is optional, it is used to specify only the clients you want to be initialized

```

> 1. When the property `paystack-client.activate-only-clients` is set, only the clients listed in this array will be instantiated

during autoconfiguration execution, See full list of possible values

[Here](paystack-clients-spring-boot-starter/src/main/java/com/chrisworks/paystackclient/SupportedClient.java).

This means that only these listed webclient bean(s) are available in the application's

context to be injected. By listing clients you're interested in, you loose the power to inject the

`SimplePaystackClient`/`ReactivePaystackClient` which is an aggregation of all the individual webclient beans in the context.

> 2. The property `paystack-client.definition-type` controls what kind (reactive or non-reactive) of webclient bean will be initialized during autoconfiguration.

Hence, it determines the location of the bean(s) (the packages holding the beans) you can use (inject) within your application logic. When the value is set to `REACTIVE`,

then you can inject clients from the package `com.chrisworks.paystackclient.definitions.reactive.*`, also the aggregate bean

`ReactivePaystackClient` will be available to you. In the case where the property is set to `NON_REACTIVE`, then you can inject

clients from the package `com.chrisworks.paystackclient.definitions.simple.*`, also `SimplePaystackClient` bean will be available.