Look into argparse for less typing of optional flags

[chuck-sys]

Please give a one-sentence summary of the feature you would like to see.

Remove optional flags in favour of optional single arguments using option nargs='?'.

Please give as many details as possible about the requirements for the feature.

Check out https://docs.python.org/3/library/argparse.html#nargs for more details. Though I type fast, it isn't no time at all. It has irked some of us for some time that you could do /rocket user view for viewing information about yourself, but you had to do /rocket user view --username @cheukyin699 to view someone else's information.