Refactor login page

frontend/pages/login.vue

@@ -8,7 +8,7 @@
         <b-card
             title="Login"
             bg-variant="light">
-          <b-btn @click="$auth.loginWith('oas')" block class="login-button">Login with OAS</b-btn>
+          <b-btn id="loginButton" @click="$auth.loginWith('oas')" block class="login-button">Login with OAS</b-btn>
         </b-card>
     </b-col>
   </b-row>

frontend/test/pages/login.js

@@ -4,7 +4,7 @@ module.exports = {
   },
   elements: {
     loginButton: {
-      selector: '.login-button'
+      selector: '#loginButton'
     }
   }
 };