fix: login messaging copyedit

Author: ginatrapani

frontend-graphql/src/components/Login.js

@@ -47,7 +47,8 @@ class Login extends Component {
   };
 
   handleError = () => {
-    const message = ' - Wrong password';
+    const message =
+      ' - Sorry, that username and password combination is not valid.';
     this.setState({ message });
   };
 

frontend/pages/login.js

@@ -33,7 +33,8 @@ class Login extends Component {
         Router.push('/');
       })
       .catch(() => {
-        message = ' - Wrong password';
+        message =
+          ' -  Sorry, that username and password combination is not valid.';
         this.setState({ message });
       });
   }