问sqlalchemy.exc.OperationalError：(MySQLdb._exceptions.OperationalError) (1045，“拒绝访问用户'taran'@'localhost‘(使用密码:是)”)

EN

from flask import Flask, jsonify, render_template, request
from flask_sqlalchemy import SQLAlchemy
from datetime import datetime

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://taran:1234@localhost/flask'
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
db = SQLAlchemy(app)

class Post(db.Model):
    id = db.Column(db.Integer, primary_key = True)
    title = db.Column(db.String(50), nullable = False)
    body = db.Column(db.String(200), nullable = False)
    date = db.Column(db.DateTime(timezone=True), default=datetime.now())


@app.route('/', methods = ['GET', 'POST'])
def home():
    title = request.form.get('title')
    body = request.form.get('body')

    post = Post(title = title, body = body)
    db.session.add(post)
    db.session.commit()
    return render_template('index.html')


if __name__ == "__main__":
    app.run(debug= True)