How to give user role without manage role permission in discord.py

from discord.ext import commands

client = commands.Bot(command_prefix='m.')
token = 'a token goes here'


@client.command()
async def player(ctx):
    role = discord.utils.get(ctx.guild.roles, name = "player")
    if role is not None:
       await ctx.author.add_roles(role)


client.run(token)

You need to have the player role in your server too. The user sends m. player as example and the bot gives him that role.