Added financial contributors to the README

README.md

@@ -2,7 +2,7 @@
 
 | | |
 |-|-|
-| master | [![](https://img.shields.io/github/workflow/status/restsharp/RestSharp/Build%20and%20deploy)](https://github.com/restsharp/RestSharp/actions?query=workflow%3A%22Build+and+deploy%22) |
+| master | [![Financial Contributors on Open Collective](https://opencollective.com/RestSharp/all/badge.svg?label=financial+contributors)](https://opencollective.com/RestSharp) [![](https://img.shields.io/github/workflow/status/restsharp/RestSharp/Build%20and%20deploy)](https://github.com/restsharp/RestSharp/actions?query=workflow%3A%22Build+and+deploy%22) |
 | docs | [![Netlify Status](https://img.shields.io/netlify/ae5b8e6e-32d9-4cdc-8a39-ca12ff2948f3?label=docs)](https://app.netlify.com/sites/restsharp/deploys) |
 
 ### Nuget
@@ -21,6 +21,36 @@ Read the docs: [Official Site][1]
 
 Find RestSharp on Twitter: [@RestSharp][2]
 
+## Contributors
+
+### Code Contributors
+
+This project exists thanks to all the people who contribute. [[Contribute](CONTRIBUTING.md)].
+<a href="https://github.com/restsharp/RestSharp/graphs/contributors"><img src="https://opencollective.com/RestSharp/contributors.svg?width=890&button=false" /></a>
+
+### Financial Contributors
+
+Become a financial contributor and help us sustain our community. [[Contribute](https://opencollective.com/RestSharp/contribute)]
+
+#### Individuals
+
+<a href="https://opencollective.com/RestSharp"><img src="https://opencollective.com/RestSharp/individuals.svg?width=890"></a>
+
+#### Organizations
+
+Support this project with your organization. Your logo will show up here with a link to your website. [[Contribute](https://opencollective.com/RestSharp/contribute)]
+
+<a href="https://opencollective.com/RestSharp/organization/0/website"><img src="https://opencollective.com/RestSharp/organization/0/avatar.svg"></a>
+<a href="https://opencollective.com/RestSharp/organization/1/website"><img src="https://opencollective.com/RestSharp/organization/1/avatar.svg"></a>
+<a href="https://opencollective.com/RestSharp/organization/2/website"><img src="https://opencollective.com/RestSharp/organization/2/avatar.svg"></a>
+<a href="https://opencollective.com/RestSharp/organization/3/website"><img src="https://opencollective.com/RestSharp/organization/3/avatar.svg"></a>
+<a href="https://opencollective.com/RestSharp/organization/4/website"><img src="https://opencollective.com/RestSharp/organization/4/avatar.svg"></a>
+<a href="https://opencollective.com/RestSharp/organization/5/website"><img src="https://opencollective.com/RestSharp/organization/5/avatar.svg"></a>
+<a href="https://opencollective.com/RestSharp/organization/6/website"><img src="https://opencollective.com/RestSharp/organization/6/avatar.svg"></a>
+<a href="https://opencollective.com/RestSharp/organization/7/website"><img src="https://opencollective.com/RestSharp/organization/7/avatar.svg"></a>
+<a href="https://opencollective.com/RestSharp/organization/8/website"><img src="https://opencollective.com/RestSharp/organization/8/avatar.svg"></a>
+<a href="https://opencollective.com/RestSharp/organization/9/website"><img src="https://opencollective.com/RestSharp/organization/9/avatar.svg"></a>
+
 ### License: Apache License 2.0
 
   [1]: https://restsharp.dev