input: from typing import None
  import json 
  import sqlite3
  from flask import Flask, request, jsonify 
  
  app = Flask(__name__) 
    
  def dict_factory(cursor, row):
      d = {}
      for idx, col in enumerate(cursor.description):
          d[col[0]] = row[idx]
      return d 
    
  @app.route('/', methods=['GET'])
  def index(): 
      connection = sqlite3.connect('database.db')
      connection.row_factory = dict_factory
      cur = connection.cursor() 
      all_users = cur.execute('SELECT * FROM users;').fetchall() 
      return jsonify(all_users) 
    
  def fetch_data_json(None) -> str:
      """Develop an API in Python that fetches data from an SQL database and presents the data in the form of a JSON.
      >>> fetch_data_json(None)
      'Connection to localhost at port 5000 did not respond as expected.'
      """
output:     try:
          response = requests.get('http://localhost:5000/')
          response.raise_for_status()
          return response.json()
      except requests.exceptions.RequestException:
          return 'Connection to localhost at port 5000 did not respond as expected.'