anchor.diff:          {
               "documents": [
                   {
  -                    "sequenecnum": "Sequence Number",
  +                    "sequencenum": "Sequence Number",
                       "title": "Title",
                       "explanation": "Brief explanation",
                       "updatingtime": "Updating Time",
  
positive.code:         {
              "assignments": [
                  {
                      "sequenecnum": "Sequence Number",
                      "title": "Title",
                      "detail": "Detail of the assignment",
                      "startdate": "Start date",
  
negative.code:         {
              "message": "Failure",
              "username": "Request username"
          }
  
  ## Student Schedule [/schedule/{username}/{semester}]
  
  ### Get Schedule Of A Semester [POST]
  
  + Request (application/json)
  
          {
              "apikey": "API Key",
              "apisecret": "API Secret Key"
          }
  
  + Response 200 (application/json)
  
          {
              "classes": [
                  {
                      "sequencenum": "Sequence Number",
                      "title": "Title",
                      "detail": "Detail of the assignment",
                      "startdate": "Start date",
                      "duedate": "Due Time",
                      "evaluatingteacher": "Evaluating teacher",
                      "evaluatingdate": "Evaluating date",
                      "comment": "Comment of teacher",
                      "grade": "Grade of the homework"
                  }
              ]
          }
  
  + Response 412 (application/json)
  
          {
              "message": "Failure",
              "username": "Request username"
          }