Add Spotify to the list of supported providers

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xml

@@ -6,11 +6,11 @@
   -->
 
   <!--
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   -->
 
   <Provider Name="ActiveDirectoryFederationServices" DisplayName="Microsoft Active Directory Federation Services"
@@ -345,6 +345,26 @@
              Description="The value used as the 'duration' parameter (can be set to 'permanent' to retrieve a refresh token)" />
   </Provider>
 
+  <!--
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+  -->
+
+  <Provider Name="Spotify" Documentation="https://developer.spotify.com/documentation/general/guides/authorization/">
+    <Environment Issuer="https://accounts.spotify.com/">
+      <Configuration AuthorizationEndpoint="https://accounts.spotify.com/authorize"
+                     TokenEndpoint="https://accounts.spotify.com/api/token"
+                     UserinfoEndpoint="https://api.spotify.com/v1/me">
+        <GrantType Value="authorization_code" />
+        <GrantType Value="client_credentials" />
+        <GrantType Value="refresh_token" />
+      </Configuration>
+    </Environment>
+  </Provider>
+
   <!--
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