question about XenForo API

[XFFA.IR Bot]

goodmorning friends
todays i need your help
so, i have an xenforo forums and i had created an api super user.
what i need from you is :

1. how to close any thread using the api, i find the edit thread but no option to close it.
2. how to create an new thread using the super user, i mean how to create thread using any user name or id, because i want to make an desktop app, so the user will able to login in the forums and post thread without going to forums web site.
3. my forums is...

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