anchor.diff:  + id: `somepresenterid` (string) - ID of Presenter
   + name: `John Doe` (string) - Presenter's name
   + email: `jdoe@mail.com` (string) - Presenter's email
  -+ phone_number: `+62819123123` (string) - Presenter's phone nmber
  ++ phone_number: `+62819123123` (string) - Presenter's phone number
   + dob: `30-12-1980` (string) - Presenter date of birth
   + date: `Rasuna 1` (string) - Presenter's DATE
   
  
positive.code: 
  + Response 404 (application/json)
  
    If there is no Facilitator with specified ID
  
    + Attributes (Error)
  
  + Response 422 (application/json)
  
    If the request body invalid or does not contain required fields
  
    + Attributes (Error)
  
  ### Unregister [DELETE]
  
  Unregister/remove Facilitator
  
  + Response 204 (application/json)
  
  + Response 404 (application/json)
  
    If there is no Facilitator with specified ID
  
    + Attributes (Error)
  
  
  
  # Data Structures
  
negative.code:   + Attributes (array[Presenter])
  
  
  ## Presenter [/presenter/{presenter_id}]
  
  + Parameters
    + presenter_id: `somepresenterid` (string) - Presenter ID
  
  ### GET [GET]
  
  