***********Project description *************

https://github.com/sunilpie1997/authenticate_using_jwt_nodejs.git

check steps.txt to get started with this

This project shows how to safely store password and at the same time authenticate users using json web token.

Benefit:a) no repeated database lookups for authenticating users in multiple requests except for the first time

    b)no need to maintain session on server(nodejs).

Note:the backend nodejs server uses MONGODB CLOUD. So,make sure to create your account on mongodb cloud and get connection uri, after clicking 'connect' tab.

Note:private_key is generated using 'puttygen' tool. You can create yours.

Benifit:json web token are created after signing with this key.
    so,that only those requests succeed that contain tokens
    in 'Authorization' header and ****ARE SIGNED BY THIS 'private_key'****

Note:'essentials' folder contain 2 files:

 a) db_properties->connection uri for mongodb cloud.ENTER CORRECT PASSWORD AND DATABASE_NAME after creating  user on MONGODB CLOUD.

 b)auth-user->contains middleware 'authenticateToken' function to verify token and extract username
 and execute database search for that username.

 ex:  router.get('/',authenticateToken,async (req,resp)=>{.......});

Note:I have used 'bcrypt' module to hash password before storing user details in DATABASE.

 and used 'bcrypt.compare' function to compare password entered by user with above 'hashed password'
 for authentication.