Register an account with IntenseDebate and get the key, which is defined in _config.yml, such as:
Intensedebate_identifier: 1ce8d80a5f6d373a46f4ceaf3dff8859, intensedebate_identifier takes the name you want to define and the value is the key you get after you register.
Source: Brief Book
The copyright of the brief book belongs to the author. For any form of reprinting, please contact the author for authorization and indicate the source.