Updated default method signatures to async pattern

Author: justonian

Auth/1_UserAuthentication/README.md

@@ -44,7 +44,7 @@ If you're using the latest version of the Chrome, Firefox, or Safari web browser
 
 ### 2. Creating a Cognito User Pool
 
-Amazon Cognito lets you add user sign-up, sign-in, and access control to your web and mobile apps quickly and easily. In this step, we'll create a Cognito user pool for our Wild Rydes app.
+Amazon Cognito User Pools lets you add user sign-up and sign-in capabilities to your web and mobile apps quickly and easily. In this step, we'll create a Cognito user pool for our Wild Rydes app.
 
 #### High-Level Instructions
 

Auth/website/src/auth/SignIn.js

@@ -34,13 +34,13 @@ class SignIn extends React.Component {
     };
   }
 
-  onSubmitForm(e) {
+  async onSubmitForm(e) {
     e.preventDefault();
     console.log('Form Submitted');
     this.setState({ stage: 1 });
   }
 
-  onSubmitVerification(e) {
+  async onSubmitVerification(e) {
     e.preventDefault();
     console.log('Verification Submitted');
     this.setState({ stage: 0, email: '', password: '', code: '' });

Auth/website/src/auth/SignUp.js

@@ -35,13 +35,13 @@ class SignUp extends React.Component {
     };
   }
 
-  onSubmitForm(e) {
+  async onSubmitForm(e) {
     e.preventDefault();
     console.log('Form Submitted');
     this.setState({ stage: 1 });
   }
 
-  onSubmitVerification(e) {
+  async onSubmitVerification(e) {
     e.preventDefault();
     console.log('Verification Submitted');
     this.setState({