openapi: 3.0.3
info:
  title: kmobile
  description: backend for mobile banking application
  version: 1.0.0
  servers:
    - url: http://api.example.com
  paths:
    /auth/login:
      post:
        summary: Login a user
        requestBody:
          required: true
          content:
            application/json:
              schema:
                type: object
                properties:
                  username:
                    type: string
                  password:
                    type: string
                required: [username, password]
        responses:
          '200':
            description: successful login
            content:
              application/json:
                schema:
                  type: object
                  properties:
                    token:
                      type: string
          '401':
            description: invalid credentials