Mailgun rotation guide (#37)

* Create mailgun.md

Create mailgun.md how to rotate file

* add mailgun images for rotation guide

add mailgun images for rotation guide

* add mailgun to _table.md

* fix image link typos and body typo

Author: jaydee-th

content/docs/introduction/_table.md

@@ -5,7 +5,7 @@
 [Azure Search Query](/docs/tutorials/azuresearchquery)|[Azure Storage](/docs/tutorials/azure)|[Eleven Labs](/docs/tutorials/elevenlabs)|
 [Eraser](/docs/tutorials/eraser)|[Flexport](/docs/tutorials/flexport)||
 [GCP](/docs/tutorials/gcp)|[GitHub](/docs/tutorials/github)|[GitLab](/docs/tutorials/gitlab)|
-[Groq](/docs/tutorials/groq)|[Mailchimp](/docs/tutorials/mailchimp)|[MaxMind](/docs/tutorials/maxmind)|
+[Groq](/docs/tutorials/groq)|[Mailchimp](/docs/tutorials/mailchimp)|[Mailgun](/docs/tutorials/mailgun)|[MaxMind](/docs/tutorials/maxmind)|
 [Microsoft Teams](/docs/tutorials/microsoftteams)|[MongoDB](/docs/tutorials/mongo)|[Netlify](/docs/tutorials/netlify)|
 [NPM](/docs/tutorials/npm)|[OpenAI](/docs/tutorials/openai)|[Sendbird](/docs/tutorials/sendbird)|
 [Sendgrid](/docs/tutorials/sendgrid)|[Slack](/docs/tutorials/slack)|[Slack Webhook](/docs/tutorials/slack-webhook)|

content/docs/tutorials/mailgun.md

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+---
+title: Mailgun
+---
+
+*This tutorial provides step-by-step instructions on how to rotate a Mailgun API Key.*
+
+---
+
+## Generate a new Mailgun API Key
+### Step 1 - Navigate to the Mailgun API Security page
+After logging in, navigate to https://app.mailgun.com/settings/api_security.
+
+Click on "Create key" in the top-right corner to generate your new API Key
+
+### Step 2 - Generate a new Mailgun API Key
+#### 2a. Click on "Create Key"
+![](/images/mailgun/1.png)
+
+#### 2b. Provide an "API Key Name" and click on "Create Key"
+![](/images/mailgun/2.png)
+
+### Step 3 - Copy the new key
+Copy the new key manually or by selecting the "Copy to Clipboard" button. Then, click "Done".
+
+> **Note:** For security reasons, Mailgun API key values are inaccessible after creation. If you lose the key, you will need to generate a new one. 
+
+---
+
+## Replace the Leaked Mailgun API Key
+Replace the leaked Mailgun API key with the new one in all impacted applications and services.
+
+---
+
+## Revoke the Leaked Mailgun API Key
+
+### Step 1 - Navigate to the Mailgun API Key page
+Navigate to https://app.mailgun.com/settings/api_security.
+
+### Step 2 - Revoke the Mailgun API Key
+#### 2a. Delete the API Key
+Click on the trash can icon next to the key that you need to delete
+![](/images/mailgun/3.png)
+
+#### 2b. Confirm deletion
+Click on "Delete" to confirm deletion of the given API key
+![](/images/mailgun/4.png)
+
+---
+
+## Resources
+- [<https://help.mailgun.com/hc/en-us/articles/203380100-Where-can-I-find-my-API-keys-and-SMTP-credentials>](https://help.mailgun.com/hc/en-us/articles/203380100-Where-can-I-find-my-API-keys-and-SMTP-credentials)