discord.py message author name code example
Example 1: discord.py message user
if message.content == "dm":
await message.channel.send("Dming user")
dm = await message.author.create_dm() # Creates a dm channel with the user
await dm.send("What you want to send") # Sends the user the message
Example 2: how to get the author on discord.py
ctx.author #Gets the author of a command
ctx.author.id #Gets the Discord ID of the author of a command