--name and --username consistency issue in CLI

• Gitea version (or commit ref): 1.7
• Can you reproduce the bug at https://try.gitea.io:
  • Not relevant

Description

In create-user --name is used, but in change-password --username is used instead.

[ngourdon]

Which one should we keep ?
I think "--name" is better. We know we're talking about user in these commands.

We should keep both parameters to ensure backward compatibility for a while.

I can contribute on this if we're OK.

[mrsdizzie]

I think this should always be --username when referring to the actual username

username is a term with a specific meaning (the username), where as name is not.

Also, an account has both a username and then a separate name/full name field so it should always use the phrase username when referring to the actual username (which this case is).