userschema = mongoose.Schema({
   org: String,
   username: String,
   fullname: String,
   password: String,
   email: String
});

db.createCollection(
   "example",{
     validator:{
       $and:[
         { "org":{$type:"string"}},
         { "username":{$type:"string"}},
         { "fullname":{$type:"double"}},
         {"password":$type:"string"}},
         {"email":{$type:"string"}}
       ]
     },
     validationLevel:"strict",
     validationAction:"error"
 })