flask web app in python can you add a login page

Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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below is a flask web app in python can you add a login page

 

from flask import Flask
import sqlite3

app = Flask(__name__)

HEADER="""<!DOCTYPE html>
<html>
    <head>
        <title>Blue</title>
        <link rel="stylesheet" href="blue.css">
    </head>
    <body>
        <h1>Blue</h1>
      
        <div class="messagebox">
"""

FOOTER="""</div>
        <div>
            <div>User: ________</div>
            <div>Message: __________</div>
            <div>[post]</div>
        </div>
    </body>
</html>
"""

def get_db():
    """Open a connection to the blue database
    and return the connection object"""
    con = sqlite3.connect("blue.db")
    con.row_factory = sqlite3.Row # return dict-like rows
    return con

def message_div(row):
    return """<div class="message"><span class="message-username">{}</span><span class="message-content">{}</span></div>\n""".format(
        row["sender"],
        row["content"]
    )

@app.route("/")
def message_feed_html():
    """Render the entire message table as HTML and return
    as a string"""
    con = get_db()
    feed = ""
    for row in con.execute("SELECT sender,content FROM messages ORDER BY ts;"):
        feed += message_div(row)  
    con.close()
    # return the complete HTML document
    return HEADER + feed + FOOTER

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

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