There are two ways (or rather, two different points of time) to configure authentication for your website. Why would you want to do it?
You might want Probely to scan your website behind a login page, like an authenticated user. For that, Probely needs to have credentials to log in and start scanning there.
So, how do you do it?
Here's a GIF that shows how to do it during the process of adding a target.
If you've already added a target you can still do it. The process is still the same, however, the set up form is in a different place. Here are some simple steps on how to get there and how to set up the authentication.
Step 1: Go to the "Settigns" tab of your target and go under "Target Authentication" and select "Form Login"
Step 2: Add the URL of the login page
It might be something along the lines of example.com/login.
Step 3: Add your first Field Name and Value (usually email or username)
The field value is the actual username or email (For example: [email protected] or ExampleUser1 etc.)
The field name is the HTML "name" attribute of the particular field. Usually, it's "email" or "username". To see the field name of a field you need to Inspect the field (Right click -> Inspect). You can see how to do this in the GIF above.
Step 4: Click "Add" to add your second Field Name and Value (usually password)
Once you click add you will get to more fields to fill out. Here you'd usually put the password value and field.
Step 5: Once you are done, click "Save"