This change allows client to send a request to create new user and then get a token on login

[VijayIyer]

• createUser by sending post request to api/v1/user with username, email, password
• login by sending post reques tto api/v1/auth/login with email, password

[render[bot]]

Your Render PR Server URL is https://pettopia-backend-pr-71.onrender.com.

Follow its progress at https://dashboard.render.com/web/srv-cgn18ugrddl4o87ifdk0.