anchor.diff:              A comprehensive list of possible errors:
               - `USER_UPDATE_INVALID_PASSWORD` if the supplied `password` does not satisfy the given criteria (regex: ^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9]).{8,}$)
               - `USER_UPDATE_INVALID_EMAIL` if the supplied `email` is not a valid email
  -            - `USER_UPDATE_INVALID_RANK` if the supplied `rank` is not a valid rank (regex: ^[1-3]$)
  +            - `USER_UPDATE_INVALID_RANK` if the supplied `rank` is not a valid rank (regex: ^(10|50|100)$)
               - `REQUEST_MALFORMED_DATA` if the submitted data in the request body does not match the Content-Type or is unparseable
   
   + Response 401 (application/json)
  
positive.code:     + name (string, required) - The `username` of the user whose details should be fetched
          
  + Response 200 (application/json)
      + Attributes (object)
          + username (string) - The name of the user
          + email (string) - The email of the user
          + rank (enum[number]) - The rank of the user (higher means more permissions)
              + Members
                  + `1` - Normal user
                  + `2` - Moderator
                  + `3` - Admin
  
  + Response 401 (application/json)
      + Attributes (object)
  
negative.code: 
  + username (string) - The users name
  + email (string) - The users email
  + rank (enum[number]) - The users rank (higher means more permissions)
      + Members
          + `10` - Normal user
          + `50` - Moderator
          + `100` - Admin
  + created_at (number) - A timestamp of the moment when the user has been created
  
  ## Entry List (object)
  
  