Validate self when calling crypto provider

When generating noonce, SSR is failing due to self not being defined. This change will have it fall back when running on the server side.

Author: ryanmwright

projects/lib/src/oauth-service.ts

@@ -2091,7 +2091,7 @@ export class OAuthService extends AuthConfig implements OnDestroy {
             let size = 45;
             let id = '';
 
-            const crypto = self.crypto || self['msCrypto'];
+            const crypto = typeof self === 'undefined' ? null : (self.crypto || self['msCrypto']);
             if (crypto) {
                 const bytes = crypto.getRandomValues(new Uint8Array(size));
                 while (0 < size--) {