anchor.diff:  + Response 200 (application/json)
   
           {
  +            "message": "Success",
  +            "username": "Request username",
               "documents": [
                   {
                       "sequencenum": "Sequence Number",
  
positive.code: + Response 200 (application/json)
  
          {
              "message": "Request received"
          }
  
  + Response 412 (application/json)
  
negative.code: + Response 200 (application/json)
  
          {
              "message": "Success",
              "username": "Request username",
          }
  
  + Response 412 (application/json)
  