anchor.diff:                  "teamId": "1",
                   "teamName": "3216 assignment 3",
                   "members": [
  -                    {"userId": "1", "name": "Niko"},
  -                    {"userId": "2", "name": "Mich"}
  +                    {
  +                        "userId": "1", 
  +                        "name": "Niko",
  +                        "acceptInvitation": 1
  +                    },
  +                    {
  +                        "userId": "2", 
  +                        "name": "Mich",
  +                        "acceptInvitation": 0
  +                    }
                   ]
               },
               {
  
positive.code: 
  + Response 200 (application/json)
  
          [
              {
                  "createdBy": {
                      "userId": "1",
                      "name": "Niko"
                  },
                  "teamId": "3",
                  "teamName": "3216 final project",
                  "members": [
                      {"userId": "1", "name": "Niko"},
                  ]
              }
          ]
          
  ## Group [/{year}/{sem}/group/{id}]
  
  ### Get group info [GET]
  
  + Response 200 (application/json)
  
          {
              "group_id": "{id}",
              "group_name": "3216 final project",
              "members": ["1", "2"]
          }
  
  ### Add members to group [POST]
  
  + Request (application/json)
  
          {
              "members": ["2", "3"]
          }
  
  + Response 200 (application/json)
  
          [
              {
                  "group_id": "3",
                  "group_name": "3216 final project",
                  "members": ["1", "2", "3"]
              }
          ]
          
  ## Friends [/friends]
  
  ### Get connected friends [GET]
  
negative.code:                 "teamId": "2",
                  "teamName": "3216 final project",
                  "members": [
                      {
                          "userId": "1", 
                          "name": "Niko",
                          "acceptInvitation": 1
                      },
                      {
                          "userId": "3", 
                          "name": "Zhi An",
                          "acceptInvitation": 1
                      }
                  ]
              }
          ]
  