Misleading error message in influxd

__Steps to reproduce:__
Run the following:
`influxd recovery user crete --username operator --password operator`

__Expected behavior:__
Error: unknown command: --crete See 'influxd -h' for help

__Actual behavior:__
Error: unknown flag: --username See 'influxd -h' for help

Start by running the documented `influxd recovery user crete --username operator --password operator` command and compare its output with the expected and actual messages. Trace the `influxd recovery user` entry point to determine why the username flag is reported before the misspelled command, then verify that the error identifies the invalid command as shown.

Written by the indexing model from the issue text.