[Backend] As a user, I can sign up with email and password

[phongvhd93]

Why

To interact with the application, users must sign in with their email and password.

Acceptance Criteria

• Create a new endpoint: POST api/v1/sign_up
  • Create a table for storing user's information.
  • Validate the user's inputs (email format, password contain at least 8 characters).
  • Request body:

    {
         "email": "user's email",
         "password": "password",
         "password": "password confirmation",
         "client_id": "client id",
         "client_secret": "client secret"
    }
    

  • Success response with HTTP status code 201
• Write tests
• Handle errors

Resource