coalesce promises together

src/webauth/agent.ts

@@ -27,48 +27,54 @@ class Agent {
         )
       );
     }
-    if (
-      Platform.OS === 'ios' &&
-      options.safariViewControllerPresentationStyle !== undefined
-    ) {
-      linkSubscription = Linking.addEventListener('url', async (event) => {
+    return new Promise(async (resolve, reject) => {
+      if (
+        Platform.OS === 'ios' &&
+        options.safariViewControllerPresentationStyle !== undefined
+      ) {
+        linkSubscription = Linking.addEventListener('url', async (event) => {
+          try {
+            linkSubscription?.remove();
+            await A0Auth0.resumeWebAuth(event.url);
+          } catch (error) {
+            reject(error);
+          }
+        });
+      }
+      try {
+        await _ensureNativeModuleIsInitialized(
+          A0Auth0,
+          parameters.clientId,
+          parameters.domain
+        );
+        let scheme = this.getScheme(
+          options.useLegacyCallbackUrl ?? false,
+          options.customScheme
+        );
+        let redirectUri = this.callbackUri(parameters.domain, scheme);
+        let credentials = await A0Auth0.webAuth(
+          scheme,
+          redirectUri,
+          options.state,
+          options.nonce,
+          options.audience,
+          options.scope,
+          options.connection,
+          options.maxAge ?? 0,
+          options.organization,
+          options.invitationUrl,
+          options.leeway ?? 0,
+          options.ephemeralSession ?? false,
+          options.safariViewControllerPresentationStyle ?? 99, //Since we can't pass null to the native layer, and we need a value to represent this parameter is not set, we are using 99.
+          //The native layer will check for this and ignore if the value is 99
+          options.additionalParameters ?? {}
+        );
+        resolve(credentials);
+      } catch (error) {
         linkSubscription?.remove();
-        await A0Auth0.resumeWebAuth(event.url);
-      });
-    }
-    try {
-      await _ensureNativeModuleIsInitialized(
-        A0Auth0,
-        parameters.clientId,
-        parameters.domain
-      );
-      let scheme = this.getScheme(
-        options.useLegacyCallbackUrl ?? false,
-        options.customScheme
-      );
-      let redirectUri = this.callbackUri(parameters.domain, scheme);
-      let credentials = await A0Auth0.webAuth(
-        scheme,
-        redirectUri,
-        options.state,
-        options.nonce,
-        options.audience,
-        options.scope,
-        options.connection,
-        options.maxAge ?? 0,
-        options.organization,
-        options.invitationUrl,
-        options.leeway ?? 0,
-        options.ephemeralSession ?? false,
-        options.safariViewControllerPresentationStyle ?? 99, //Since we can't pass null to the native layer, and we need a value to represent this parameter is not set, we are using 99.
-        //The native layer will check for this and ignore if the value is 99
-        options.additionalParameters ?? {}
-      );
-      return credentials;
-    } catch (error) {
-      linkSubscription?.remove();
-      throw error;
-    }
+        reject(error);
+      }
+    });
   }
 
   async logout(