diff --git a/src/lib/webpage-impact/README.md b/src/lib/webpage-impact/README.md
index 808f9fc..7686a50 100644
--- a/src/lib/webpage-impact/README.md
+++ b/src/lib/webpage-impact/README.md
@@ -24,6 +24,7 @@ The follwing config parameters are optional:
 - `headers`:
   - `accept`: string https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept
   - `accept-encoding`: array of allowed encodings (a single encoding can also be passed as a string) https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-Encoding
+- `username`: The plugin supports simple logins with username and password. Provide the username if the page you want to measure requires such a login. The password needs to be stored in a shell environment variable called `WI_PASSWORD`. Please note, that the login may fail nevertheless because the plugin expects a certain interface that may not be provided by your page.
 
 ### Returns
 
diff --git a/src/lib/webpage-impact/index.ts b/src/lib/webpage-impact/index.ts
index 6cc18c0..688be9c 100644
--- a/src/lib/webpage-impact/index.ts
+++ b/src/lib/webpage-impact/index.ts
@@ -24,6 +24,7 @@ type WebpageImpactOptions = {
   reload: boolean;
   cacheEnabled: boolean;
   scrollToBottom?: boolean;
+  username?: string;
 };
 
 type ResourceBase = {
@@ -176,6 +177,7 @@ const WebpageImpactUtils = () => {
           reload: false,
           cacheEnabled: false,
           scrollToBottom: config?.scrollToBottom,
+          username: config?.username,
         });
 
         let reloadedResources: Resource[] | undefined;
@@ -203,7 +205,7 @@ const WebpageImpactUtils = () => {
   const loadPageResources = async (
     page: Page,
     url: string,
-    {reload, cacheEnabled, scrollToBottom}: WebpageImpactOptions
+    {reload, cacheEnabled, scrollToBottom, username}: WebpageImpactOptions
   ): Promise<Resource[]> => {
     try {
       await page.setCacheEnabled(cacheEnabled);
@@ -254,6 +256,20 @@ const WebpageImpactUtils = () => {
 
       if (!reload) {
         await page.goto(url, {waitUntil: 'networkidle0'});
+        if (username !== undefined) {
+          const password = process.env.WI_PASSWORD;
+          if (password === undefined) {
+            throw new Error(
+              `${LOGGER_PREFIX}: Username but no password provided. Store password in environment variable 'WI_PASSWORD'.`
+            );
+          }
+          await page.type('#username', username);
+          await page.type('#password', password);
+
+          await page.click('#submit');
+
+          await page.waitForNavigation();
+        }
       } else {
         await page.reload({waitUntil: 'networkidle0'});
       }