How do you assign roles with the discord.py rewrite?

Question

I am creating a discord bot using discord.py rewrite and am hosting iton repl.it. I am trying to add assignment of roles, but I get an error everytime I try to

Answer 1

I added Alberto Poljak's suggestions and it worked!

import discord.utils 
@client.command()
async def role(ctx, * role: discord.Role):
  user = ctx.message.author
  await user.add_roles(role)