Authentication

Given an app.js file and a database file userData.db consisting of a table user.

Write APIs to perform operations on the table user containing the following columns,

User Table

Column	Type
username	TEXT
name	TEXT
password	TEXT
gender	TEXT
location	TEXT

API 1

Path: /register

Method: POST

Request

{
  "username": "adam_richard",
  "name": "Adam Richard",
  "password": "richard_567",
  "gender": "male",
  "location": "Detroit"
}

• Scenario 1

  • Description:

    If the username already exists

  • Response

    • Status code

      400
      

    • Status text

      User already exists
      

• Scenario 2

  • Description:

    If the registrant provides a password with less than 5 characters

  • Response

    • Status code

      400
      

    • Status text

      Password is too short
      

• Scenario 3

  • Description:

    Successful registration of the registrant

  • Response

    • Status code

      200
      

    • Status text

    User created successfully
    

API 2

Path: /login

Method: POST

Request

{
  "username": "adam_richard",
  "password": "richard_567"
}

• Scenario 1

  • Description:

    If an unregistered user tries to login

  • Response

    • Status code

      400
      

    • Status text

      Invalid user
      

• Scenario 2

  • Description:

    If the user provides incorrect password

  • Response

    • Status code

      400
      

    • Status text

      Invalid password
      

• Scenario 3

  • Description:

    Successful login of the user

  • Response

    • Status code

      200
      

    • Status text

      Login success!
      

API 3

Path: /change-password

Method: PUT

Request

{
  "username": "adam_richard",
  "oldPassword": "richard_567",
  "newPassword": "richard@123"
}

• Scenario 1

  • Description:

    If the user provides incorrect current password

  • Response

    • Status code

      400
      

    • Status text

      Invalid current password
      

• Scenario 2

  • Description:

    If the user provides new password with less than 5 characters

  • Response

    • Status code

      400
      

    • Status text

      Password is too short
      

• Scenario 3

  • Description:

    Successful password update

  • Response

    • Status code

      200
      

    • Status text

      Password updated
      

Use npm install to install the packages.

Export the express instance using the default export syntax.

Use Common JS module syntax.