Add Figma to the list of supported providers

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.cs

@@ -1457,6 +1457,9 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                          context.UserInfoResponse?.HasParameter("lastName")  is true
                     => $"{(string?) context.UserInfoResponse?["firstName"]} {(string?) context.UserInfoResponse?["lastName"]}",
 
+                // Figma returns the username as a custom "handle" node:
+                ProviderTypes.Figma => (string?) context.UserInfoResponse?["handle"],
+
                 // Huawei returns the username as a custom "display_name" in the backchannel identity token:
                 ProviderTypes.Huawei => context.BackchannelIdentityTokenPrincipal?.GetClaim("display_name"),
 
@@ -1531,17 +1534,17 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                 ProviderTypes.Atlassian => (string?) context.UserInfoResponse?["account_id"],
 
                 // These providers return the user identifier as a custom "id" node:
-                ProviderTypes.Airtable    or ProviderTypes.Basecamp      or ProviderTypes.Box        or
-                ProviderTypes.Dailymotion or ProviderTypes.Deezer        or ProviderTypes.Discord    or
-                ProviderTypes.Disqus      or ProviderTypes.Facebook      or ProviderTypes.Genesys    or
-                ProviderTypes.Gitee       or ProviderTypes.GitHub        or ProviderTypes.Harvest    or
-                ProviderTypes.Kook        or ProviderTypes.Kroger        or ProviderTypes.Lichess    or
-                ProviderTypes.Linear      or ProviderTypes.Mastodon      or ProviderTypes.Meetup     or
-                ProviderTypes.Miro        or ProviderTypes.Nextcloud     or ProviderTypes.Patreon    or
-                ProviderTypes.Pipedrive   or ProviderTypes.Reddit        or ProviderTypes.Smartsheet or
-                ProviderTypes.Spotify     or ProviderTypes.SubscribeStar or ProviderTypes.Todoist    or
-                ProviderTypes.Twitter     or ProviderTypes.Webflow       or ProviderTypes.Weibo      or
-                ProviderTypes.Yandex      or ProviderTypes.Zoom
+                ProviderTypes.Airtable    or ProviderTypes.Basecamp  or ProviderTypes.Box           or
+                ProviderTypes.Dailymotion or ProviderTypes.Deezer    or ProviderTypes.Discord       or
+                ProviderTypes.Disqus      or ProviderTypes.Facebook  or ProviderTypes.Figma         or
+                ProviderTypes.Genesys     or ProviderTypes.Gitee     or ProviderTypes.GitHub        or
+                ProviderTypes.Harvest     or ProviderTypes.Kook      or ProviderTypes.Kroger        or
+                ProviderTypes.Lichess     or ProviderTypes.Linear    or ProviderTypes.Mastodon      or
+                ProviderTypes.Meetup      or ProviderTypes.Miro      or ProviderTypes.Nextcloud     or
+                ProviderTypes.Patreon     or ProviderTypes.Pipedrive or ProviderTypes.Reddit        or
+                ProviderTypes.Smartsheet  or ProviderTypes.Spotify   or ProviderTypes.SubscribeStar or
+                ProviderTypes.Todoist     or ProviderTypes.Twitter   or ProviderTypes.Webflow       or
+                ProviderTypes.Weibo       or ProviderTypes.Yandex    or ProviderTypes.Zoom
                     => (string?) context.UserInfoResponse?["id"],
 
                 // Bitbucket returns the user identifier as a custom "uuid" node:

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xml

@@ -851,6 +851,36 @@
                  ConfigurationEndpoint="https://api.faceit.com/auth/v1/openid_configuration" />
   </Provider>
 
+  <!--
+                                                ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
+                                                ██ ▄▄▄█▄ ▄██ ▄▄ ██ ▄▀▄ █ ▄▄▀██
+                                                ██ ▄▄███ ███ █▀▀██ █ █ █ ▀▀ ██
+                                                ██ ████▀ ▀██ ▀▀▄██ ███ █ ██ ██
+                                                ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
+  -->
+
+  <Provider Name="Figma" Id="2bb1d445-2de1-4c9e-ad47-f289f32c7edd"
+            Documentation="https://developers.figma.com/docs/rest-api/authentication/">
+    <Environment Issuer="https://www.figma.com/">
+      <Configuration AuthorizationEndpoint="https://www.figma.com/oauth"
+                     TokenEndpoint="https://api.figma.com/v1/oauth/token"
+                     UserInfoEndpoint="https://api.figma.com/v1/me">
+        <CodeChallengeMethod Value="S256" />
+
+        <GrantType Value="authorization_code" />
+        <GrantType Value="refresh_token" />
+
+        <TokenEndpointAuthMethod Value="client_secret_basic" />
+      </Configuration>
+
+      <!--
+        Note: Figma requires sending the "current_user:read" scope to be able to use the userinfo endpoint.
+      -->
+
+      <Scope Name="current_user:read" Default="true" Required="true" />
+    </Environment>
+  </Provider>
+
   <!--
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                                               ██ ▄▄▄█▄ ▄█▄▄ ▄▄██ ▄▄▀█▄ ▄█▄▄ ▄▄██
@@ -1121,11 +1151,13 @@
     </Environment>
   </Provider>
 
+  <!--
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                                     ██ ▄▄ █ ▄▄▄█▄▀▀▀▄█ ▄▄▀█ ███ ███ ███ ████ ▄▄ █ ▀▀ ███ ████
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+  -->
 
   <Provider Name="HeyBoxChat" Id="b1b84538-0487-4106-bf53-4d0390523686"
             Documentation="https://s.apifox.cn/43256fe4-9a8c-4f22-949a-74a3f8b431f5/7145802m0">