[Evolution] "[p]evolution market store" errors when run in DMs

[chloecormier]

Running the [p]evolution market store command causes an error when run in DMs, it works fine if the same person runs it in a server instead:

Exception in command 'evolution market store'
Traceback (most recent call last):
  File "/home/red/.local/lib/python3.8/site-packages/discord/ext/commands/core.py", line 85, in wrapped
    ret = await coro(*args, **kwargs)
  File "/home/red/.local/share/Red-DiscordBot/cogs/CogManager/cogs/evolution/evolution.py", line 189, in store
    if ctx.channel.permissions_for(ctx.guild.me).embed_links:
AttributeError: 'NoneType' object has no attribute 'me'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/red/.local/lib/python3.8/site-packages/discord/ext/commands/bot.py", line 903, in invoke
    await ctx.command.invoke(ctx)
  File "/home/red/.local/lib/python3.8/site-packages/redbot/core/commands/commands.py", line 825, in invoke
    await super().invoke(ctx)
  File "/home/red/.local/lib/python3.8/site-packages/discord/ext/commands/core.py", line 1307, in invoke
    await ctx.invoked_subcommand.invoke(ctx)
  File "/home/red/.local/lib/python3.8/site-packages/redbot/core/commands/commands.py", line 825, in invoke
    await super().invoke(ctx)
  File "/home/red/.local/lib/python3.8/site-packages/discord/ext/commands/core.py", line 1307, in invoke
    await ctx.invoked_subcommand.invoke(ctx)
  File "/home/red/.local/lib/python3.8/site-packages/discord/ext/commands/core.py", line 855, in invoke
    await injected(*ctx.args, **ctx.kwargs)
  File "/home/red/.local/lib/python3.8/site-packages/discord/ext/commands/core.py", line 94, in wrapped
    raise CommandInvokeError(exc) from exc
discord.ext.commands.errors.CommandInvokeError: Command raised an exception: AttributeError: 'NoneType' object has no attribute 'me'