diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..04ee5f3
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+vendor/
+.phpunit.result.cache
+.idea/
diff --git a/LICENSE b/LICENSE
index 0969233..fb6eb5d 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2024 Galette Community
+Copyright (©) 2024 The Galette Team
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..3d545a4
--- /dev/null
+++ b/README.md
@@ -0,0 +1,91 @@
+# Galette Provider for OAuth 2.0 Client
+
+This package provides Galette OAuth 2.0 support for the PHP League's [OAuth 2.0 Client](https://github.com/thephpleague/oauth2-client).
+
+The [Galette OAuth plugin](https://galette-community.github.io/plugin-oauth2/) must be installed on you [Galette](https://galette.eu) instance.
+
+## Installation
+
+```cmd
+composer require galette-community/oauth2-galette
+```
+
+## Usage
+
+```php
+$galetteProvider = new \Galette\OAuth2\Client\Provider\Galette([
+    //information related to the app where you will use galette-oauth2
+    'clientId'      => 'yourId',          // The client ID assigned to you
+    'clientSecret'  => 'yourSecret',      // The client password assigned to you
+    'redirectUri'   => 'yourRedirectUri', // The return URL you specified for your app
+    //information related to the galette instance you want to connect to
+    'instance'      => 'yourInstance',    // The instance of Galette you want to connect to
+    'pluginDir'     => 'yourPluginDir',   // The directory where the plugin is installed - defaults to 'plugin-oauth2'
+]);
+
+// Get authorization code
+if (!isset($_GET['code'])) {
+    // Options are optional, defaults to 'read_prefs' only
+    $options = ['instance' => 'https://my.galette'];
+
+    // Get authorization URL
+    $authorizationUrl = $galetteProvider->getAuthorizationUrl($options);
+
+    // Get state and store it to the session
+    $_SESSION['oauth2state'] = $galetteProvider->getState();
+
+    // Redirect user to authorization URL
+    header('Location: ' . $authorizationUrl);
+    exit;
+// Check for errors
+} elseif (empty($_GET['state']) || (isset($_SESSION['oauth2state']) && $_GET['state'] !== $_SESSION['oauth2state'])) {
+    if (isset($_SESSION['oauth2state'])) {
+        unset($_SESSION['oauth2state']);
+    }
+    exit('Invalid state');
+} else {
+    // Get access token
+    try {
+        $accessToken = $galetteProvider->getAccessToken(
+            'authorization_code',
+            [
+                'code' => $_GET['code']
+            ]
+        );
+    } catch (\League\OAuth2\Client\Provider\Exception\IdentityProviderException $e) {
+        exit($e->getMessage());
+    }
+
+    // Get resource owner
+    try {
+        $resourceOwner = $galetteProvider->getResourceOwner($accessToken);
+    } catch (\League\OAuth2\Client\Provider\Exception\IdentityProviderException $e) {
+        exit($e->getMessage());
+    }
+        
+    // Now you can store the results to session etc.
+    $_SESSION['accessToken'] = $accessToken;
+    $_SESSION['resourceOwner'] = $resourceOwner;
+    
+    var_dump(
+        $resourceOwner->getId(),
+        $resourceOwner->getEmail(),
+        $resourceOwner->getUsername(),
+        $resourceOwner->getLang(),
+        $resourceOwner->getStatus(),
+        $resourceOwner->toArray()
+    );
+}
+```
+
+For more information see the PHP League's general usage examples.
+
+## Testing
+
+``` bash
+./vendor/bin/phpunit
+```
+
+## License
+
+The MIT License (MIT). Please see [License File](https://github.com/jbelien/oauth2-openstreetmap/blob/master/LICENSE) for more information.
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..0b0c0e8
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,38 @@
+{
+    "name": "galette/oauth2-galette",
+    "description": "Galette OAuth 2.0 support for the PHP League's OAuth 2.0 client",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Johan Cwiklinski",
+            "homepage": "https://github.com/trashy"
+        }
+    ],
+    "keywords": [
+        "oauth",
+        "oauth2",
+        "client",
+        "authorization",
+        "authorisation",
+        "galette"
+    ],
+    "require": {
+        "php": "^8.1",
+        "league/oauth2-client": "^2.7"
+    },
+    "autoload": {
+        "psr-4": {
+            "Galette\\OAuth2\\Client\\": "src/"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "Galette\\OAuth2\\Client\\Test\\": "tests/src/"
+        }
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^10.5",
+        "squizlabs/php_codesniffer": "^3.8",
+        "mockery/mockery": "^1.6"
+    }
+}
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
new file mode 100644
index 0000000..092fa61
--- /dev/null
+++ b/phpunit.xml.dist
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit backupGlobals="false"
+         bootstrap="vendor/autoload.php"
+         colors="true"
+         processIsolation="false"
+         stopOnFailure="false"
+>
+    <testsuites>
+        <testsuite name="Package Test Suite">
+            <directory suffix=".php">./tests/</directory>
+        </testsuite>
+    </testsuites>
+</phpunit>
diff --git a/src/Provider/Galette.php b/src/Provider/Galette.php
new file mode 100644
index 0000000..fffcdd4
--- /dev/null
+++ b/src/Provider/Galette.php
@@ -0,0 +1,101 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Galette\OAuth2\Client\Provider;
+
+use League\OAuth2\Client\Provider\AbstractProvider;
+use League\OAuth2\Client\Provider\Exception\IdentityProviderException;
+use League\OAuth2\Client\Token\AccessToken;
+use League\OAuth2\Client\Tool\BearerAuthorizationTrait;
+use Psr\Http\Message\ResponseInterface;
+
+class Galette extends AbstractProvider
+{
+    use BearerAuthorizationTrait;
+
+    /**
+     * Galette instance URL
+     *
+     * @var string
+     */
+    protected string $instance;
+
+    /**
+     * Plugin installation directory
+     *
+     * @var string
+     */
+    protected string $pluginDirectory = 'plugin-oauth2';
+
+    /**
+     * @var array
+     */
+    protected array $scope;
+
+    public function __construct(array $options = [], array $collaborators = [])
+    {
+        if (!isset($options['instance'])) {
+            throw new \InvalidArgumentException(
+                'The "instance" option not set. Please set a Galette instance URL.'
+            );
+        }
+        $this->instance = $options['instance'];
+
+        if (isset($options['scope'])) {
+            $this->scope = $options['scope'];
+        }
+
+        if (isset($options['pluginDir'])) {
+            $this->pluginDirectory = $options['pluginDir'];
+        }
+
+        parent::__construct($options, $collaborators);
+    }
+
+    public function getBaseURL(): string
+    {
+        return sprintf(
+            '%s/plugins/%s',
+            trim($this->instance, '/'),
+            $this->pluginDirectory
+        );
+    }
+
+    public function getBaseAuthorizationUrl()
+    {
+        return $this->getBaseURL() . '/authorize';
+    }
+
+    public function getBaseAccessTokenUrl(array $params)
+    {
+        return $this->getBaseURL() . '/access_token';
+    }
+
+    public function getResourceOwnerDetailsUrl(AccessToken $token)
+    {
+        return $this->getBaseURL() . '/user';
+    }
+
+    protected function getDefaultScopes()
+    {
+        return [];
+    }
+
+    protected function checkResponse(ResponseInterface $response, $data)
+    {
+        $statusCode = $response->getStatusCode();
+        if ($statusCode > 400) {
+            throw new IdentityProviderException(
+                $data['message'] ?: $response->getReasonPhrase(),
+                $statusCode,
+                $response
+            );
+        }
+    }
+
+    protected function createResourceOwner(array $response, AccessToken $token)
+    {
+        return new GaletteResourceOwner($response);
+    }
+}
diff --git a/src/Provider/GaletteResourceOwner.php b/src/Provider/GaletteResourceOwner.php
new file mode 100644
index 0000000..dcbef0c
--- /dev/null
+++ b/src/Provider/GaletteResourceOwner.php
@@ -0,0 +1,82 @@
+<?php
+
+namespace Galette\OAuth2\Client\Provider;
+
+use League\OAuth2\Client\Provider\ResourceOwnerInterface;
+use League\OAuth2\Client\Tool\ArrayAccessorTrait;
+
+class GaletteResourceOwner implements ResourceOwnerInterface
+{
+	use ArrayAccessorTrait;
+
+    /**
+     * @var array<string, mixed>
+     */
+    protected array $response;
+
+    public function __construct(array $response = [])
+    {
+        $this->response = $response;
+    }
+
+    /**
+     * Get resource owner id
+     *
+     * @return int|null
+     */
+    public function getId(): ?int
+    {
+        return $this->getValueByKey($this->response, 'id');
+    }
+
+    /**
+     * Get resource owner email
+     *
+     * @return string|null
+     */
+    public function getEmail(): ?string
+    {
+        return $this->getValueByKey($this->response, 'email');
+    }
+
+    /**
+     * Get resource owner username
+     *
+     * @return string|null
+     */
+    public function getUsername(): ?string
+    {
+        return $this->getValueByKey($this->response, 'username');
+    }
+
+    /**
+     * Get resource owner language
+     *
+     * @return string|null
+     */
+    public function getLang(): ?string
+    {
+        return $this->getValueByKey($this->response, 'language');
+    }
+
+    /**
+     * Get resource owner membership status
+     *
+     * @return int|null
+     */
+    public function getStatus(): ?int
+    {
+        return (int)$this->getValueByKey($this->response, 'status');
+    }
+
+
+    /**
+     * Return all owner details available as an array.
+     *
+     * @return array
+     */
+    public function toArray(): array
+    {
+        return $this->response;
+    }
+}
\ No newline at end of file
diff --git a/tests/src/Provider/GaletteTest.php b/tests/src/Provider/GaletteTest.php
new file mode 100644
index 0000000..39e5c15
--- /dev/null
+++ b/tests/src/Provider/GaletteTest.php
@@ -0,0 +1,202 @@
+<?php
+
+namespace Galette\OAuth2\Client\Test\Provider;
+
+use JBelien\OAuth2\Client\Provider\OpenStreetMap;
+use League\OAuth2\Client\Tool\QueryBuilderTrait;
+use Mockery as m;
+use PHPUnit\Framework\TestCase;
+use GuzzleHttp\Psr7\Stream;
+
+class GaletteTest extends TestCase
+{
+    use QueryBuilderTrait;
+
+    protected string $instance = 'https://galette.localhost/galette';
+    protected string $pluginDir = 'oauth2Plugin';
+    protected \Galette\OAuth2\Client\Provider\Galette $provider;
+
+    protected function setUp(): void
+    {
+        $this->provider = new \Galette\OAuth2\Client\Provider\Galette([
+            'clientId'      => 'mock_client_id',
+            'clientSecret'  => 'mock_secret',
+            'redirectUri'   => 'mock_redirect_uri',
+            'instance'      => $this->instance,
+            'pluginDir'     => $this->pluginDir,
+        ]);
+    }
+
+    public function testAuthorizationUrl()
+    {
+        $url = $this->provider->getAuthorizationUrl();
+        $uri = parse_url($url);
+        parse_str($uri['query'], $query);
+
+        $this->assertArrayHasKey('client_id', $query);
+        $this->assertArrayHasKey('response_type', $query);
+        $this->assertArrayHasKey('redirect_uri', $query);
+        $this->assertNotNull($this->provider->getState());
+    }
+
+    public function testGetBaseAccessTokenUrl()
+    {
+        $params = [];
+
+        $url = $this->provider->getBaseAccessTokenUrl($params);
+        $uri = parse_url($url);
+
+        $this->assertEquals('/galette/plugins/oauth2Plugin/access_token', $uri['path']);
+    }
+
+    public function testGetAuthorizationUrl()
+    {
+        $url = $this->provider->getAuthorizationUrl();
+        $uri = parse_url($url);
+
+        $this->assertEquals('/galette/plugins/oauth2Plugin/authorize', $uri['path']);
+    }
+
+    public function testGetAccessToken()
+    {
+        $response = m::mock('Psr\Http\Message\ResponseInterface');
+        //$response->shouldReceive('getBody')->andReturn('{"access_token": "mock_access_token", "token_type": "bearer", "account_id": "12345", "uid": "deprecated_id"}');
+        $response
+            ->shouldReceive('getBody')
+            ->andReturn(
+                new Stream(
+                    fopen(
+                        'data://text/plain,{"access_token": "mock_access_token"}',
+                        'r'
+                    )
+                )
+            );
+        $response
+            ->shouldReceive('getStatusCode')
+            ->andReturn(200);
+
+        $response->shouldReceive('getHeader')->andReturn(['content-type' => 'json']);
+
+        $client = m::mock('GuzzleHttp\ClientInterface');
+        $client->shouldReceive('send')->times(1)->andReturn($response);
+        $this->provider->setHttpClient($client);
+
+        $token = $this->provider->getAccessToken('authorization_code', ['code' => 'mock_authorization_code']);
+        $this->assertEquals('mock_access_token', $token->getToken());
+    }
+
+    public function testUserData()
+    {
+        $userId = 42;
+        $username = 'mock_username';
+        $email = 'mock_mail@mock_domain.com';
+        $lang = 'fr_FR';
+        $status = 1;
+
+        $postResponse = m::mock('Psr\Http\Message\ResponseInterface');
+        $postResponse
+            ->shouldReceive('getBody')
+            ->andReturn(
+                new Stream(
+                    fopen(
+                        'data://text/plain,{"access_token": "mock_access_token"}',
+                        'r'
+                    )
+                )
+            );
+
+        $postResponse
+            ->shouldReceive('getStatusCode')
+            ->andReturn(200);
+
+        $postResponse->shouldReceive('getHeader')->andReturn(['content-type' => 'json']);
+
+        $userResponse = m::mock('Psr\Http\Message\ResponseInterface');
+        $userResponse
+            ->shouldReceive('getBody')
+            ->andReturn(
+                new Stream(
+                    fopen(
+                        'data://text/plain,{"id": '.$userId.', "username": "'.$username.'", "email": "'.$email.'", "language": "'.$lang.'", "status": '.$status.'}',
+                        'r'
+                    )
+                )
+            );
+
+        $userResponse->shouldReceive('getHeader')->andReturn(['content-type' => 'json']);
+        $userResponse->shouldReceive('getStatusCode')->andReturn(200);
+
+        $client = m::mock('GuzzleHttp\ClientInterface');
+        $client->shouldReceive('send')
+            ->times(2)
+            ->andReturn($postResponse, $userResponse);
+        $this->provider->setHttpClient($client);
+
+        $token = $this->provider->getAccessToken('authorization_code', ['code' => 'mock_authorization_code']);
+        $user = $this->provider->getResourceOwner($token);
+
+        $this->assertEquals($userId, $user->getId());
+        $this->assertEquals($email, $user->getEmail());
+        $this->assertEquals($username, $user->getUsername());
+        $this->assertEquals($lang, $user->getLang());
+        $this->assertEquals($status, $user->getStatus());
+
+        $this->assertSame(
+            [
+                'id' => $userId,
+                'username' => $username,
+                'email' => $email,
+                'language' => $lang,
+                'status' => $status,
+            ],
+            $user->toArray()
+        );
+    }
+
+    public function testUserDataFails()
+    {
+        $this->expectException(\League\OAuth2\Client\Provider\Exception\IdentityProviderException::class);
+        $status = rand(400,600);
+
+        $postResponse = m::mock('Psr\Http\Message\ResponseInterface');
+        $postResponse
+            ->shouldReceive('getBody')
+            ->andReturn(
+                new Stream(
+                    fopen(
+                        'data://text/plain,{"access_token": "mock_access_token"}',
+                        'r'
+                    )
+                )
+            );
+
+        $postResponse
+            ->shouldReceive('getStatusCode')
+            ->andReturn(200);
+
+        $postResponse->shouldReceive('getHeader')->andReturn(['content-type' => 'json']);
+
+        $userResponse = m::mock('Psr\Http\Message\ResponseInterface');
+        $userResponse
+            ->shouldReceive('getBody')
+            ->andReturn(
+                new Stream(
+                    fopen(
+                        'data://text/plain,{"error": "invalid_request","message": "Unknown request"}',
+                        'r'
+                    )
+                )
+            );
+        $userResponse->shouldReceive('getHeader')->andReturn(['content-type' => 'json']);
+        $userResponse->shouldReceive('getStatusCode')->andReturn($status);
+        $userResponse->shouldReceive('getReasonPhrase')->andReturn('Unknown request');
+
+        $client = m::mock('GuzzleHttp\ClientInterface');
+        $client->shouldReceive('send')
+            ->times(2)
+            ->andReturn($postResponse, $userResponse);
+        $this->provider->setHttpClient($client);
+        $token = $this->provider->getAccessToken('authorization_code', ['code' => 'mock_authorization_code']);
+        $user = $this->provider->getResourceOwner($token);
+    }
+}