added azurefunctionkey guide (#13)

content/docs/tutorials/azurefunctionkey.md

@@ -0,0 +1,43 @@
+---
+title: Azure Function
+---
+
+_This tutorial provides step-by-step instructions on how to rotate an Azure Function Key._
+
+---
+
+## Regenerate an Azure Function Key
+
+### Step 1 - Navigate to the Azure Function App page
+
+#### 1a. Navigate to `Azure Function App`
+
+Navigate to the `Azure Function App` page and click on the relevant `Azure Function App`.
+![](/images/azurefunction/1.png)
+
+#### 1b. Navigate to `App keys`
+
+Under `Functions`, click on `App keys`.
+![](/images/azurefunction/2.png)
+
+### Step 2 - Regenerate the Function key
+
+See under `Host keys (all functions)`, click `Renew key value`. If you have multiple keys, clicking the `Show value` will reveal the key's information. Ensure that you are rotating the correct key.
+![](/images/azurefunction/3.png)
+Confirm the key renewal action by clicking `Renew and save`.
+
+![](/images/azurefunction/4.png)
+
+> Note: Clicking `Renew key value` will revoke the existing key in addition to creating a new one.
+
+---
+
+## Replace the Leaked Azure Function Key
+
+Replace the leaked Azure Function Key with the new one in all impacted applications and services.
+
+---
+
+## Resources
+
+- [Azure Function Key Documentation](https://learn.microsoft.com/en-us/azure/azure-functions/)