feat: Add announcements endpoints (#91)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Alexandre Teles (afterSt0rm) <alexandre.teles@ufba.br>

api/login.py

@@ -0,0 +1,54 @@
+"""
+This module provides a blueprint for the login endpoint.
+
+Routes:
+    - POST /login: Login to the API
+"""
+
+from sanic import Blueprint, Request
+from sanic.response import JSONResponse, json
+from sanic_ext import openapi
+from sanic_beskar.exceptions import AuthenticationError
+
+from auth import beskar
+from limiter import limiter
+
+from config import api_version
+
+
+login: Blueprint = Blueprint("login", version=api_version)
+
+
+@login.post("/login")
+@openapi.definition(
+    summary="Login to the API",
+)
+@limiter.limit("3 per hour")
+async def login_user(request: Request) -> JSONResponse:
+    """
+    Login to the API.
+
+    **Args:**
+        - username (str): The username of the user to login.
+        - password (str): The password of the user to login.
+
+    **Returns:**
+        - JSONResponse: A Sanic JSONResponse object containing the access token.
+    """
+
+    req = request.json
+    username = req.get("username", None)
+    password = req.get("password", None)
+    if not username or not password:
+        return json({"error": "Missing username or password"}, status=400)
+
+    try:
+        user = await beskar.authenticate(username, password)
+    except AuthenticationError:
+        return json({"error": "Invalid username or password"}, status=403)
+
+    if not user:
+        return json({"error": "Invalid username or password"}, status=403)
+
+    ret = {"access_token": await beskar.encode_token(user)}
+    return json(ret, status=200)