{
	"username": Text 	
	"email" : Email 	
	"provider": Text 	
	"password" : Password 	
	"resetPasswordToken": Text 	
	"confirmationToken" : Text 	
	"confirmed" : Boolean 	
	"blocked": Boolean 	
	"role" : Relation with Role (from: users-permissions)	
	"profile" : Profile, // Relation with Profile
}

{
		"category": Text, 
		"answerType": Enum // trueOrFalse | multipleChoice | shortAnswer
		"question": Text,
	  "image": Text(optional),

		"answer": Text,
		"explanation": Text, // 정답 설명
		"difficulty": Number,
		"importance": Number,

+   "correctCnt" : Number,
+   "incorrectCnt" : Number

		"profile" : Profile // Relation with Profile, 1:1
	  "quiz_pack": QuizPack[] // Relation with QuizPack, 다:1 
    "likes": Like[] // Relation with Like, 
	  "comments": Comment[] // Relation with Comment, 
}

{
	  "title": Text,
		"tags":  Tag[] // // Relation with Tag, '다:다'
		"description":  Text // 퀴즈세트 설명 내용

		"profile": Profile // Relation with Profile, '다:1',
		"quizzes": Quiz[], // Relation with Quiz, '1:다'

}

{
		"nickname":Text,
		"points": Number,

		"users_permissions_user" : User,
		"achivements": Achievement[] // Relation with Achievement, '다:다'
	  "quizzes": Quiz[], //  Relation with Quiz, '1:다'
		"quiz_packs" :QuizPack[] // Relation with QuizPack, '1:다'  => 자기가 만든 것

    "likes": Like[], // Relation with Like, '1:다'
    "comments": String[], // Relation with Comment, '1:다'
}

{
	"title" : String
	"profiles": Profile[] // Relation with Profile, '다:다',
}

{
	  "content": Text,
	  "author": Profile[] // Relation with Profile, '다:1',
	  "quiz": Quiz, // Relation with Quiz, '다:1'
}

{
	  "author": Profile[] // Relation with Profile, '다:1',
	  "quiz": Quiz, // Relation with Quiz, '다:1'
}

{
	"content" : Text 
	"quiz_packs": QuizPack[] // Relation with QuizPack,'다:다'
}