description.txt

MyConnection: 
	- used static Connection to use it directly later.
	- check if not null, because by default Connection 
	  points to null, and to avoid null exception.

Welcome:
	- BufferedReader is used for IO, it gives IOExcetion so, catched it.
	- used switch case using lambda expression(intro12)
-> logIn():
	- taking email from the user, if user exist, genOtp->sendOtp-> then check if entered otp and genOtp are equal the welcome otherwise invalid 	  	  otp.
-> signUp():
	- take name and email from the user  genOtp->sendOtp->verify the otp if otp.equals(genOtp) -> saveUser 	  else invalid otp

Model -> User:
	- taken name and email with const and getter setter 
	Data:
	- taken all the fields of data table with getter setter and constructors

DAO -> userDAO: 
	- create isUserExist() to check if the user exist in our db or not 
	- created saveUser() , if user does not exist then save it in db or insert in the users table
    -> dataDao:
	->getAllFiles():
		- this will show all the files, as list
	-> hideFile():
		- main motive is to store the file data in our db and delete that file 
		- filereader is used to read file data , and setCharacterStream() to set for blob data(bin_data)

Service -> UserService:
	- created saveUser() to check if user return 0 means false else save it to db.

	-> GenerateOTP:
	- create String getOtp() and to get random four digits using string formating , only 4 digits

	-> SendOtpServie:
	- class to send otp