Update app.py

app.py

@@ -0,0 +1,71 @@
+from fastapi import FastAPI, HTTPException, Form
+from fastapi.middleware.cors import CORSMiddleware
+from pydantic import BaseModel
+import sqlite3
+import hashlib
+
+app = FastAPI()
+
+# CORS (allow frontend on another origin like mobile app)
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],  # or set your domain/app origin
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+# Initialize SQLite
+conn = sqlite3.connect("users.db", check_same_thread=False)
+cursor = conn.cursor()
+cursor.execute('''
+    CREATE TABLE IF NOT EXISTS users (
+        id INTEGER PRIMARY KEY AUTOINCREMENT,
+        email TEXT UNIQUE NOT NULL,
+        password TEXT NOT NULL
+    )
+''')
+conn.commit()
+
+# Utility function to hash passwords
+def hash_password(password: str) -> str:
+    return hashlib.sha256(password.encode()).hexdigest()
+
+# Models
+class SignupForm(BaseModel):
+    email: str
+    password: str
+
+class LoginForm(BaseModel):
+    email: str
+    password: str
+
+# Routes
+@app.post("/signup")
+def signup(data: SignupForm):
+    email = data.email.lower().strip()
+    password = hash_password(data.password)
+
+    try:
+        cursor.execute("INSERT INTO users (email, password) VALUES (?, ?)", (email, password))
+        conn.commit()
+        return {"success": True, "message": "Account created successfully"}
+    except sqlite3.IntegrityError:
+        raise HTTPException(status_code=409, detail="Email already registered")
+
+@app.post("/login")
+def login(data: LoginForm):
+    email = data.email.lower().strip()
+    password = hash_password(data.password)
+
+    cursor.execute("SELECT * FROM users WHERE email = ? AND password = ?", (email, password))
+    user = cursor.fetchone()
+
+    if user:
+        return {"success": True, "message": "Login successful"}
+    else:
+        raise HTTPException(status_code=401, detail="Invalid credentials")
+
+@app.get("/")
+def root():
+    return {"message": "FastAPI Auth API is running 🚀"}