In order to clear saved data, such as authentication tokens from your web browser, the following guides can be used for various browsers;

Chrome:

https://support.google.com/chrome/answer/95647?co=GENIE.Platform%3DDesktop&hl=en

1. On your computer, open Chrome.
2. At the top right, click More   Settings.
3. At the bottom, click Advanced.
4. Under "Privacy and security," click Content settings.
5. Click Cookies.
6. Under "See all cookies and site data," search for the website's name.
7. To the right of the site, click Remove .

Firefox:

https://support.mozilla.org/en-US/kb/delete-cookies-remove-info-websites-stored

1. Click the menu button  and choose Preferences.

2. Select the Privacy & Security panel and go to the History section.

3. In the drop-down menu next to Firefox will, choose Use custom settings for history.
   
4. Click Show Cookies.... The Cookies window will appear.

   

5. In the Search: field, type the name of the site whose cookies you want to remove. The cookies that match your search will be displayed.

6. Select the cookie(s) in the list to remove and click Remove Selected.
7. Close the Cookies window. Close the about:preferences page.

Safari:

https://support.apple.com/safari 

Choose Safari > Preferences, click Privacy, then do any of the following:

• Remove stored cookies and data: Click Manage Website Data, select one or more websites, then click Remove or Remove All.

Internet Explorer 10, 11, Edge:

http://www.thewindowsclub.com/delete-internet-cache-particular-website