Bugsee can authenticate with Freshdesk through either basic authentication (login/password) or personal API tokens. While the former doesn't require any special setup, to obtain the personal token please follow these steps:
Click on your Profile Picture on the top right and select "Profile Settings"
In the sidebar on the right, you will find the API Key
Then paste the token into Bugsee integration wizard along with the URL of your organizaion on freshdesk: