[Portal] Fix HTTP method in wallet users API example from POST to GET (#6868)

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## PR-Codex overview
This PR focuses on updating the documentation for fetching user details from the in-app wallet API, providing clearer instructions, examples, and a new method for retrieving user data.

### Detailed summary
- Changed the title from `Get Users` to `Fetch a Single User`.
- Added detailed instructions for fetching user details via a `GET` request.
- Specified query parameters and their descriptions.
- Included authentication requirements.
- Provided example `curl` commands for fetching user details by email and wallet address.
- Described the response format for the API.
- Introduced convenience methods using the `getUser` method from the thirdweb SDK.
- Updated the command for fetching all users from `POST` to `GET`.

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Author: joaquim-verges

apps/portal/src/app/connect/wallet/get-users/page.mdx

@@ -1,5 +1,6 @@
 import { Callout } from "@doc";
-import { createMetadata, ArticleIconCard } from "@doc";
+import { createMetadata, ArticleIconCard, Stack } from "@doc";
+import { TypeScriptIcon } from "@/icons";
 
 export const metadata = createMetadata({
 	image: {
@@ -10,7 +11,116 @@ export const metadata = createMetadata({
 	description: "Learn how to fetch in-app wallet users for your application.",
 });
 
-# Get Users
+# Fetch a Single User
+
+From the backend, you are able to get the details of any user within your in app or ecosystem wallet.
+
+To get the user details, you can make a `GET` request to the following endpoint:
+
+```
+https://in-app-wallet.thirdweb.com/api/2023-11-30/embedded-wallet/user-details
+```
+
+### Query Parameters
+
+You can specify the query parameter `queryBy` to query by different user identifiers:
+
+- `queryBy`: The parameter to query by. Can be one of `walletAddress`, `email`, `phone`, `externalWalletAddress`, or `id`.
+
+You can then specify the value to query by, matching the queryBy parameter:
+
+- `walletAddress`: The user's wallet address that thirdweb has generated for them
+- `email`: The user's email address
+- `phone`: The user's phone number
+- `externalWalletAddress`: The user's wallet address that used to login via SIWE
+- `id`: The user's ID (for custom auth)
+
+### Authentication
+
+You need to include your ThirdWeb Client Secret in the Authorization header.
+
+If you are an ecosystem owner, you have to include the `x-ecosystem-id` header and optionally the `x-ecosystem-partner-id` header if the ecosystem is set to partners only.
+
+### Example curl Command
+
+Here's an example curl command to fetch user details by email:
+
+```bash
+
+curl -X GET 'https://in-app-wallet.thirdweb.com/api/2023-11-30/embedded-wallet/user-details?queryBy=email&[email protected]' \
+  -H 'x-secret-key: YOUR_SECRET_KEY'
+
+```
+
+Here's an example curl command to fetch user details by address:
+
+```bash
+curl -X GET 'https://in-app-wallet.thirdweb.com/api/2023-11-30/embedded-wallet/user-details?queryBy=walletAddress&walletAddress=0x123456789abcdef' \
+  -H 'x-secret-key: YOUR_SECRET_KEY'
+```
+
+Here's an example curl command to fetch the user details for an ecosystem owner:
+
+```bash
+curl -X GET 'https://in-app-wallet.thirdweb.com/api/2023-11-30/embedded-wallet/user-details?queryBy=walletAddress&walletAddress=0x123456789abcdef' \
+  -H 'x-secret-key: YOUR_SECRET_KEY' \
+  -H 'x-ecosystem-id: ecosystem.YOUR_ECOSYSTEM_ID' \
+  -H 'x-ecosystem-partner-id: YOUR_PARTNER_ID'
+```
+
+In both examples, replace `YOUR_SECRET_KEY` with your actual ThirdWeb Client Secret.
+
+Replace `YOUR_ECOSYSTEM_ID` and `YOUR_PARTNER_ID` with your actual ecosystem ID and partner ID respectively. The partner ID can be one you set up for yourself as the ecosystem owner.
+
+### Response Format
+
+The API returns a JSON array with the following structure for each user:
+
+```json
+[
+  {
+    "userId": "string",
+    "walletAddress": "string",
+    "email": "string (optional)",
+    "phone": "string (optional)",
+    "createdAt": "string",
+    "linkedAccounts": [
+      {
+        "type": "string",
+        "details": {
+          "phone": "string",
+          // or
+          "email": "string",
+          // or
+          "address": "string",
+          // or
+          "id": "string",
+          // Additional key-value pairs may be present
+        }
+      }
+    ]
+  }
+]
+```
+
+Note: The `details` object in `linkedAccounts` will contain different fields based on the account type. See the [list of Strategies](#list-of-strategies) above for more information.
+
+Remember to handle the response appropriately in your chosen programming language, including error cases and parsing the JSON response.
+
+### Convenience Methods
+
+If you are using the thirdweb SDK, you can use the `getUser` method to retrieve user details.
+
+<Stack>
+ <ArticleIconCard
+	title="getUser"
+	icon={TypeScriptIcon}
+	description="Get user details from your backend for thirdweb wallets in TypeScript"
+	href="/references/typescript/v5/getUser"
+/>
+</Stack>
+
+# Fetch All Users
 
 Once you have users connecting to your app through in-app wallets, you can fetch all users through our REST API:
 ```
@@ -31,7 +141,7 @@ You need to include the following headers:
 Here's an example curl command to pregenerate a thirdweb wallet for the user `[email protected]`:
 
 ```bash
-curl -X POST 'https://in-app-wallet.thirdweb.com/api/v1/users?offset=200&limit=100' \
+curl -X GET 'https://in-app-wallet.thirdweb.com/api/v1/users?offset=200&limit=100' \
   -H 'x-secret-key: YOUR_SECRET_KEY' \
   -H 'Content-Type: application/json'
 ```
@@ -67,4 +177,3 @@ A successful API call returns an array of user objects in the following format:
   }
 ]
 ```
-