add(provider): Fetch Criipto configuration on load

This will try to verify that the domain and client ID are correct, and throw if not.

Author: janmeier

src/provider.tsx

@@ -217,6 +217,20 @@ const CriiptoVerifyProvider = (props: CriiptoVerifyProviderOptions): React.React
       const configuration = await client.fetchOpenIDConfiguration();
       if (isSubscribed) setConfiguration(configuration);
     })();
+    (async () => {
+      try {
+        // This tries to verify that the domain and client id are correct
+        await client.fetchCriiptoConfiguration();
+      } catch (error) {
+        if (isSubscribed) {
+          setResult(() => {
+            // Throwing directly from the async function does nothing. But using a setState action
+            // injects the error into the react render loop.
+            throw error;
+          });
+        }
+      }
+    })();
 
     return () => {
       isSubscribed = false;