Added jwt token authentication

Author: shivkumar5

contest/models/problem/problem.json

@@ -1,4 +1,3 @@
-<<<<<<< HEAD:contest/models/problem/problem.json
 {
     "code":{
         "type":"string",
@@ -54,58 +53,4 @@
     "contest":{
         "type":"string"
     }
-=======
-{
-    "code":{
-        "type":"string",
-        "required":true,
-        "unique":true
-   },
-    "name":{
-        "type":"string",
-        "required":true
-    },
-    "level":{
-        "type":"string"
-    },
-    "description":{
-        "type":"string",
-        "default":""
-    },
-    "successfulSubmission":{
-        "type":"number",
-        "default":0
-    },
-    "input_format":{
-        "type":"string"
-    },
-    "output_format":{
-        "type":"string"
-    },
-    "constraints":{
-        "type":"string"
-    },
-    "input_example":{
-        "type":"string"
-    },
-    "output_example":{
-        "type":"string"
-    },
-    "explanation_example":{
-        "type":"string",
-        "default":""
-    },
-    "date_added":{
-        "type":"date"
-    },
-    "timelimit":{
-        "type":"number"
-    },
-    "sourcelimit":{
-        "type":"number"
-    },
-    "author":{
-        "type":"string"
-    }
->>>>>>> aae61357893efc5840f7327a2cce64f575d50d4d:server/models/problem/problem.json
 }