How to make an error about not specifying the discord.py role?

Question

Python

I tried to make a command thanks to which I can issue roles on command. But I stopped at the question "How to make a mistake about not mentioning a role?" this is how I tried to do it:

@client.command()
@commands.has_permissions(administrator=True)
async def giverole(self, ctx, user: discord.Member=None, role=discord.Role):
  await user.add_roles(role)
  if user is None:
    embed = discord.Embed(
    title='**Moderation | error**',
    description="""<:None:936319127247806497>|•**Member not specified!**
<:None:936319127247806497>|•**Участник не указан**""", timestamp=ctx.message.created_at, color = discord.Colour.dark_red()
  )
  embed.set_footer(text="Modertion | error", icon_url=ctx.author.avatar_url)
  elif role == None:
    embed = discord.Embed(
    title='**Moderation | error**',
    description="""<:None:936319127247806497>|•**discord role not specified!**
<:None:936319127247806497>|•**Не указана дискорд роль**""", timestamp=ctx.message.created_at, color = discord.Colour.dark_red()
  )
  embed.set_footer(text="Modertion | error", icon_url=ctx.author.avatar_url)
  else:
    embed = discord.Embed(
    title="moderation",
    description="""the role was given! 
Роль была выдона"""
    timestamp=ctx.message.created_at, color discord.Colour.green()
  )
  embed.set_footer(text="Modertion | /giverole", icon_url=ctx.author.avatar_url)
  await ctx.send(embed=embed)

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Answer 1

Just like with the user:

...role: discord.Role=None):
...
    if role == None:
        ...