input: 
  def fetch_data_from_sql_to_json() -> str:
      """
      Develop an API in Python that fetches data from an SQL database and presents the data in the form of a JSON.
      This function does not take any input but initializes a Flask app with a route that queries all users from
      a SQLite database named 'database.db' and returns the result in JSON format. Note that this function is meant
      to be a prototype and would require further setup for a production environment, including error handling.
      
      Example:
      The function should be run in an environment where 'database.db' contains a 'users' table. Upon accessing the
      root endpoint of the Flask app, it should return a list of users in JSON format.
      
      Example Output:
      When the endpoint is accessed, it might return:
      [{"id": 1, "name": "Alice", "email": "alice@example.com"}, {"id": 2, "name": "Bob", "email": "bob@example.com"}]
      """
  
output:     
      from flask import Flask, jsonify
      import sqlite3
  
      app = Flask(__name__)
  
      @app.route('/')
      def get_users():
          conn = sqlite3.connect('database.db')
          cursor = conn.cursor()
          cursor.execute("SELECT id, name, email FROM users")
          users = cursor.fetchall()
          conn.close()
  
          user_list = [{"id": user[0], "name": user[1], "email": user[2]} for user in users]
          return jsonify(user_list)
  
      if __name__ == '__main__':
          app.run(debug=True)
  