API Keys panel allows accessing Leon API from the interface in order to obtain feed of different kinds of data from Leon for the purpose of outside integrations.
The functionality generates a Refresh Token, which is a special kind of token that can be used to obtain a renewed access token which allows programmatically accessing a protected resource. Access tokens are attached to API request. More information can be found in the documentation (https://bitbucket.org/leondevteam/api-documentation/src/master/).
The token can be generated only by admins in Settings → API keys page.
How to generate a token
It is also possible to edit existing 'API Keys' and update the Name, Description and Resources.