Gives an error message. What to do?

Question

Python

Hello, I'm trying to make custom roles on the server, but when using the change command, I get an error:

Command raised an exception: AttributeError: 'str' object has no attribute 'value'

Code I am using:

import discord
from discord.ext import commands
import random
import json
from discord.utils import get

class Custom(commands.Cog):
  
  def __init__ (self, client):
    self.client = client

  @commands.command()
  async def role (self, ctx):
    await open_acc(ctx.author)
    users = await get_roles_data()
    user = ctx.author
    role = await ctx.guild.create_role(name="Роль")
    await ctx.author.add_roles(role)
    id = role.id
    users[str(user.id)]["role"] = id
    
    with open("roles.json", "w") as f:
      json.dump(users, f, indent=4)
      
  @commands.command()
  async def роль (self, ctx, color, *, name):
    await open_acc(ctx.author)
    users = await get_roles_data()
    user = ctx.author
    rid = users[str(user.id)]["role"]
    role = get(ctx.guild.roles, id=rid)
    await role.edit(name=name, color=color)
    await ctx.send("Роль успешно изменена.")

async def open_acc(user):
  users = await get_roles_data()
  if str(user.id) in users:
    return False
  else:
    users[str(user.id)] = {}
    users[str(user.id)]["role"] = None
    
  with open("roles.json", "w") as f:
    json.dump(users, f, indent=4)
    return True

async def get_roles_data():
  with open("roles.json", "r") as f:
    users = json.load(f)
    return users

def setup(client):
  client.add_cog(Custom(client))