Create Sign In and Signup system

User Story

• As a: developer,
• I want: to develop the sign in system
• so that: authorized customers can sign in the website with valid credentials to view profile.

Functional Requirements

• Prepare sign in form (inputs: username, password; button: sign in)
• Validate username and password
• Navigate to landing page for valid credentials after sign in and sign up

Description

Prepare a demo user profile and validate the credentials.