input: Write a function to insert a student record into a SQLite database.
  assert insert_student("example.db", "Jane Doe", 22) is None
  assert insert_student("example.db", "Alice Smith", 19) is None
  assert insert_student("example.db", "Bob Brown", 25) is None
output: import sqlite3
  
  def insert_student(database, name, age):
      conn = sqlite3.connect(database)
      cursor = conn.cursor()
      cursor.execute('''
          CREATE TABLE IF NOT EXISTS students (
              id INTEGER PRIMARY KEY AUTOINCREMENT,
              name TEXT NOT NULL,
              age INTEGER NOT NULL
          )
      ''')
      cursor.execute('INSERT INTO students (name, age) VALUES (?, ?)', (name, age))
      conn.commit()
      conn.close()