auth/email.py

from flask_mail import Message
from flask import current_app
from .extensions import mail

def send_otp(email, otp):
    msg = Message(
        subject="Your OTP Code",
        sender=current_app.config["MAIL_USERNAME"],
        recipients=[email]
    )
    msg.body = f"Your OTP is {otp}"
    mail.send(msg)