string_gen.py

from pyrogram import Client, enums

api_id = input("Enter Your API ID: \n")
api_hash = input("Enter Your API HASH : \n")

with Client("my_account", api_id=api_id, api_hash=api_hash, hide_password=True) as bot_:
    first_name = (bot_.get_me()).first_name
    string_session_ = f"<b><u>String Session For {first_name}</b></u> \n<code>{bot_.export_session_string()}</code>"
    bot_.send_message(
        "me",
        string_session_,
        parse_mode=enums.ParseMode.HTML,
        disable_web_page_preview=True,
    )
    print(f"String Has Been Sent To Your Saved Message : {first_name}")