User Can Login

[scottalexandra]

Happy Path:
As an unauthenticated user, when I visit /login and fill in the email field with my email and the password field with my password, then click the Login button, I am logged in. I am redirected to the /dashboard where I see a flash message Welcome back <my_username>

Sad Path:
As an unauthenticated user, when I visit '/login' and fill in the email field with my email and the password field with my password, then click the Login button, I see a flash message that reads Invalid username or password. Please try again..

• create user table/model
• create '/login' endpoint
• setup user login action and reducers
• login route
• Login Form Component