in the Apple Account page where is the Computer Authorizations "Deauthorize All" button (or how else can I do it)

I need to "deauthorize" all my computers.

This Apple support page is supposed to tell me how to do it, but it seems the relevant info is outdated:

https://support.apple.com/en-us/118292?&cid=acs::fm-itunes_HT201251

Under the heading "If you need to deauthorize a computer that you don’t have access to", step 4 says "On the Account Information page, look next to Computer Authorizations, then click Deauthorize All."

Only when I log on to my Apple Account there is no "Account Information" page, and I can't find the Deauthorize All button.

Help on how I can deauthorize all my computers is greatly appreciated.

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Background info, on why I need to do this.

I got a new MacBook and I want to share my Music library with my other Macs. I've done it before with Home Sharing, but this time when I tried to authorize my new MacBook it tells me I've reached the authorized devices number limit of 5.

I want to keep sharing the library with my current devices so the devices I want to deauthorize are all unused ones that won't start, which means I can't deauthorize them individually. In this case I need to first deauthorize all devices and then re-authorize the ones I want to use, it says, and thus the need to complete this task.