Task Tracker API with Login

Problem/Feature Description

A project management tool needs a backend API that lets team members log in, view their tasks, and create new tasks. The API will be internet-facing and the team wants it production-ready from the start.

The API should have three endpoints: one for user authentication, one for listing tasks, and one for creating a new task.

Output Specification

Produce a single Python file named main.py that:

• Defines a FastAPI application with three routes:
  • POST /auth/login -- user authentication
  • GET /tasks -- list tasks for the current user
  • POST /tasks -- create a new task

Route handlers may return stub data (no real database or auth logic required). All imports must be present and the file must be syntactically valid Python.