Guild id required

[quirky-bluejay]

The Issue
In the utils.manage_commands functions for some commands None can be passed for the guild_id parameter to specify using a global scope, but the parameter is not optional
It would be expected that if you don't pass a guild id that it would use the global scope, instead of having to pass None

Ideal solution
Make the guild_id parameter optional

Expected behaviour
utils.manage_commands.get_all_commands(id, token) should work
ATM you have to do (id, token, None)

[eunwoo1104]

Applying that to all of the functions would be hard, since it will require reformatting sequence of parameters. However get_all_commands seems possible, don't know why I didn't already apply that to it.

[eunwoo1104]

Fixed on #57