Allow Redis client as argument for storage

.changeset/grumpy-kings-decide.md

@@ -0,0 +1,5 @@
+---
+'@shopify/shopify-app-session-storage-redis': minor
+---
+
+Added support for passing in a `RedisClient` instance as argument in addition to connection URL.

packages/apps/session-storage/shopify-app-session-storage-redis/README.md

@@ -2,6 +2,10 @@
 
 This package implements the `SessionStorage` interface that works with an instance of [Redis](https://redis.io/).
 
+You can create an instance of `RedisSessionStorage` in several ways:
+
+## Using a connection URL
+
 ```js
 import {shopifyApp} from '@shopify/shopify-app-express';
 import {RedisSessionStorage} from '@shopify/shopify-app-session-storage-redis';
@@ -12,18 +16,22 @@ const shopify = shopifyApp({
   ),
   // ...
 });
+```
 
-// OR
+## Using a URL object
 
+```js
 const shopify = shopifyApp({
   sessionStorage: new RedisSessionStorage(
     new URL('redis://username:password@host/database'),
   ),
   // ...
 });
+```
 
-// OR
+## Using credential components
 
+```js
 const shopify = shopifyApp({
   sessionStorage: RedisSessionStorage.withCredentials(
     'host.com',
@@ -35,4 +43,20 @@ const shopify = shopifyApp({
 });
 ```
 
+## Using a RedisClient instance
+
+> [!NOTE]
+> Remember that `RedisSessionStorage` will connect to the database, but won't disconnect from it.
+> If you need to restart the connection, you'll need to manually connect again for the storage to continue working.
+
+```js
+import {RedisClientOptions, createClient} from 'redis';
+const client = createClient({url: 'redis://username:password@host/database'});
+
+const shopify = shopifyApp({
+  sessionStorage: new RedisSessionStorage(client),
+  // ...
+});
+```
+
 If you prefer to use your own implementation of a session storage mechanism that is compatible with the `@shopify/shopify-app-express` package, see the [implementing session storage guide](../shopify-app-session-storage/implementing-session-storage.md).