old_contents: from flask.ext.security import login_required, current_user
  from flask import Blueprint
  
  mod = Blueprint('user_key', __name__)
  
  @mod.route('/user_key')
  @login_required
  def user_key():
      return render_template('user.html', user=current_user)
  
new_contents: from flask.ext.security import login_required, current_user
  from flask import (Blueprint, render_template)
  
  mod = Blueprint('user_key', __name__)
  
  @mod.route('/user_key')
  @login_required
  def user_key():
      return render_template('user.html', user=current_user)
  
subject: Fix imports in view user_key