application.py

from flask import Flask, request

app = Flask(__name__)

data = {"username":"", "password":""}

@app.route("/")
def get_():
    return data

@app.route("/",methods = ['POST'])
def post():
    data_json=request.get_json()
    if data_json is None:
        return 'Invalid JSON data', 400

    data['username']=data_json['username']
    data['password']=data_json['password']
    print(f"Data received {data_json}")

    return [data['username'], data['password']]

@app.route("/", methods =['PUT'])
def put():
    str = request.args.get('password')
    print(f"New password received {str}")
    data['password'] = str
    return [data['username'], data['password']]

app.run(host='0.0.0.0', port=5000)

EOF