This document is part of the Appwrite contributors' guide. Before you continue reading this document make sure you have read the [Code of Conduct](https://github.com/appwrite/appwrite/blob/master/CODE_OF_CONDUCT.md) and the [Contributing Guide](https://github.com/appwrite/appwrite/blob/master/CONTRIBUTING.md).
OAuth2 providers help users to log in to the apps and websites without the need to provide passwords or any other type of credentials. Appwrite's goal is to have support from as many **major** OAuth2 providers as possible.
As of the writing of these lines, we do not accept any minor OAuth2 providers. For us to accept some smaller and potentially unlimited number of OAuth2 providers, some product design and software architecture changes must be applied first.
It's really easy to contribute to an open source project, but when using GitHub, there are a few steps we need to follow. This section will take you step-by-step through the process of preparing your own local version of Appwrite, where you can make any changes without affecting Appwrite right away.
> If you are experienced with GitHub or have made a pull request before, you can skip to [Implement new provider](#2-implement-new-provider).
### 1.1 Fork the Appwrite repository
Before making any changes, you will need to fork Appwrite's repository to keep branches on the official repo clean. To do that, visit the [Appwrite Github repository](https://github.com/appwrite/appwrite) and click on the fork button.
![Fork button](images/fork.png)
This will redirect you from `github.com/appwrite/appwrite` to `github.com/YOUR_USERNAME/appwrite`, meaning all changes you do are only done inside your repository. Once you are there, click the highlighted `Code` button, copy the URL and clone the repository to your computer using `git clone` command:
> To fork a repository, you will need a basic understanding of CLI and git-cli binaries installed. If you are a beginner, we recommend you to use `Github Desktop`. It is a really clean and simple visual Git client.
Finally, you will need to create a `feat-XXX-YYY-oauth` branch based on the `master` branch and switch to it. The `XXX` should represent the issue ID and `YYY` the OAuth provider name.
Add a logo image to your new provider in this path: `public/images/users`. Your logo should be a png 100×100px file with the name of your provider (all lowercase). Please make sure to leave about 30px padding around the logo to be consistent with other logos.
Create a new file `XXX.php` where `XXX` is the name of the OAuth provider in [`PascalCase`](https://stackoverflow.com/a/41769355/7659504) in this location
Inside this file, create a new class that extends the basic OAuth2 provider abstract class. Note that the class name should start with a capital letter, as PHP FIG standards suggest.
Once a new class is created, you can start to implement your new provider's login flow. We have prepared a starting point for Oauth provider class below, but you should also consider looking at other provider's implementation and try to follow the same standards.
After you finished adding your new provider to Appwrite, you should be able to see it in your Appwrite console. Navigate to 'Project > Users > Providers' and check your new provider's settings form.
You can test your OAuth2 provider by trying to login using the [OAuth2 method](https://appwrite.io/docs/client/account#accountCreateOAuth2Session) when integrating the Appwrite Web SDK in a demo app.
Pass your new adapter name as the provider parameter. If login is successful, you will be redirected to your success URL parameter. Otherwise, you will be redirected to your failure URL.
First of all, commit the changes with the message `Added XXX OAuth2 Provider` and push it. This will publish a new branch to your forked version of Appwrite. If you visit it at `github.com/YOUR_USERNAME/appwrite`, you will see a new alert saying you are ready to submit a pull request. Follow the steps GitHub provides, and at the end, you will have your pull request submitted.
If you need any help with the contribution, feel free to head over to [our discord channel](https://appwrite.io/discord) and we'll be happy to help you out.