Add Dangerous Discord Database (#2124)

resolve #1521 

README.md

@@ -1065,6 +1065,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Ayrshare](https://www.ayrshare.com) | Social media APIs to post, get analytics, and manage multiple users social media accounts | `apiKey` | Yes | Yes |
 | [Buffer](https://buffer.com/developers/api) | Access to pending and sent updates in Buffer | `OAuth` | Yes | Unknown |
 | [Cisco Spark](https://developer.ciscospark.com) | Team Collaboration Software | `OAuth` | Yes | Unknown |
+| [Dangerous Discord Database](https://discord.riverside.rocks/docs/index.php) | Database of malicious Discord accounts | `apiKey` | Yes | Unknown |
 | [Discord](https://discord.com/developers/docs/intro) | Make bots for Discord, integrate Discord onto an external platform | `OAuth` | Yes | Unknown |
 | [Disqus](https://disqus.com/api/docs/auth/) | Communicate with Disqus data | `OAuth` | Yes | Unknown |
 | [Doge-Meme](https://api.doge-meme.lol/docs) | Top meme posts from r/dogecoin which include 'Meme' flair | No | Yes | Yes |