fix: replace Promise. calls in async functions with native behaviour

Author: jankapunkt

lib/grant-types/client-credentials-grant-type.js

@@ -69,13 +69,9 @@ class ClientCredentialsGrantType extends AbstractGrantType {
 	 */
 
   async saveToken(user, client, scope) {
-    const fns = [
-      this.validateScope(user, client, scope),
-      this.generateAccessToken(client, user, scope),
-      this.getAccessTokenExpiresAt(client, user, scope),
-    ];
-
-    const [validatedScope, accessToken, accessTokenExpiresAt] = await Promise.all(fns);
+    const validatedScope = await this.validateScope(user, client, scope);
+    const accessToken = await this.generateAccessToken(client, user, scope);
+    const accessTokenExpiresAt = await this.getAccessTokenExpiresAt(client, user, scope);
     const token = {
       accessToken: accessToken,
       accessTokenExpiresAt: accessTokenExpiresAt,

lib/handlers/authorize-handler.js

@@ -308,7 +308,7 @@ AuthorizeHandler.prototype.validateRedirectUri = async function(redirectUri, cli
     return this.model.validateRedirectUri(redirectUri, client);
   }
 
-  return Promise.resolve(client.redirectUris.includes(redirectUri));
+  return client.redirectUris.includes(redirectUri);
 };
 /**
  * Get response type.

lib/handlers/token-handler.js

@@ -76,11 +76,11 @@ TokenHandler.prototype.handle = async function(request, response) {
   }
 
   if (request.method !== 'POST') {
-    return Promise.reject(new InvalidRequestError('Invalid request: method must be POST'));
+    throw new InvalidRequestError('Invalid request: method must be POST');
   }
 
   if (!request.is('application/x-www-form-urlencoded')) {
-    return Promise.reject(new InvalidRequestError('Invalid request: content must be application/x-www-form-urlencoded'));
+    throw new InvalidRequestError('Invalid request: content must be application/x-www-form-urlencoded');
   }
 
   try {