fix(oauth): properly validate broadcaster token before api call

Author: sogehige

src/api.ts

@@ -198,7 +198,8 @@ class API extends Core {
           isBlocking = fnc;
 
           // run validation before any requests
-          if (!(await oauth.validateOAuth('bot') || await oauth.validateOAuth('broadcaster'))) {
+          const[ botValidation, broadcasterValidation ] = await Promise.all(oauth.validateTokens());
+          if (!botValidation || !broadcasterValidation) {
             continue;
           }
 

src/oauth.ts

@@ -119,11 +119,14 @@ class OAuth extends Core {
 
   @onStartup()
   onStartup() {
-    this.validateOAuth('bot');
-    this.validateOAuth('broadcaster');
+    this.validateTokens();
     this.getChannelId();
   }
 
+  validateTokens() {
+    return [this.validateOAuth('bot'), this.validateOAuth('broadcaster')];
+  }
+
   @onLoad('broadcasterAccessToken')
   @onLoad('botAccessToken')
   setBotAccessTokenLoaded() {