Add PingOne to the list of supported providers

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xml

@@ -559,6 +559,26 @@
     <Environment Name="Sandbox"    Issuer="https://www.paypal.com/" />
   </Provider>
 
+  <!--
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+                                        ██ ████▀ ▀██ ██▄ ██ ▀▀▄██ ▀▀▀ ██ ██▄ ██ ▀▀▀██
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+  -->
+
+  <Provider Name="PingOne" Documentation="https://docs.pingidentity.com/r/en-us/pingoneforenterprise/p14e_connect_oidc">
+    <!--
+      Note: PingOne is a multitenant identity provider that doesn't have a generic issuer URI.
+      As such, the complete URI must always be set in the options (and include the environment ID).
+    -->
+
+    <Environment Issuer="{settings.Issuer}" />
+
+    <Setting PropertyName="Issuer" ParameterName="issuer" Type="Uri" Required="true"
+             Description="The URI used to access the PingOne instance (e.g 'https://auth.pingone.eu/3bedc164-22f1-4f8f-9f51-227975033cbd/as')" />
+  </Provider>
+
   <!--
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