change the method name from signIn to _goToServices

src/views/landing-view/landing-view.js

-/* eslint class-methods-use-this: ["error", { "exceptMethods": ["_signIn"] }] */
+/* eslint class-methods-use-this: ["error", { "exceptMethods": ["_goToServices"] }] */
 import { LitElement, html, css } from 'lit-element';
 
 import '@material/mwc-button';
@@ -154,7 +154,7 @@ class LandingView extends LitElement
                         <h1>Helmholtz Cloud</h1>
                         <p>a portfolio of seamlessly accessible IT services to support scientific work.</p>
                         <div>
-                            <div @click="${this._signIn}">
+                            <div @click="${this._goToServices}">
                                 <mwc-button raised>Show Services</mwc-button>
                             </div>
                         </div>
@@ -178,7 +178,7 @@ class LandingView extends LitElement
         `;
     }
 
-    _signIn()
+    _goToServices()
     {
         window.location.href = `/#/services`;
     }