Click on the "Sign Up" button and Create an Account.
Enter a name for your App and put https://example.com in APP WEBSITE URL. You can Leave other two fields empty.
Page after clicking 'Create Account' and filling values
Click on Save button.
Page after clicking 'Save' button
On This page, click on Generate Access Token and Copy the token. Save the copied token in your bot's configuration file as environment variable with the following name: