MediaWiki::API v0.41 worries

Skeeve has asked for the wisdom of the Perl Monks concerning the following question:

When trying to understand MediaWiki::API badtoken every now and then I found this message in my MediaWiki (version 0.41) object:

{
  "warnings": {
    "login": {
      "*": "Main-account login via action=login is deprecated and may 
+stop working without warning. To continue login with action=login, se
+e [[Special:BotPasswords]]. To safely continue using main-account log
+in, see action=clientlogin."
    }
  },
  "login": {
    "result": "Success",
    "lguserid": 11,
    "lgusername": "…",
    "lgtoken": "…",
    "cookieprefix": "…",
    "sessionid": "…"
  }
}
[download]

Is this something I need to worry about?
Is this a known issue?
Are there workarounds?

Update

Seems I just had to open the wiki's link mentioned in the object.

Opening that link and logging in, I could create a "Bot-Account" for my account which, when used in login, does not produce the warning anymore.

I have yet to see whether this has any influence on the other issue.

s$$([},&%#}/&/]+}%&{})*;#$&&s&&$^X.($'^"%]=\&(|?*{%
+.+=%;.#_}\&"^"-+%*).}%:##%}={~=~:.")&e&&s""`$''`"e

Comment on MediaWiki::API v0.41 worries Select or Download Code

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Re: MediaWiki::API v0.41 worries by LanX (Saint) on Mar 28, 2018 at 14:48 UTC
why two threads? -> MediaWiki::API badtoken every now and then Cheers Rolf _{(addicted to the Perl Programming Language and ☆☆☆☆ :) Wikisyntax for the Monastery}	[reply]
Re^2: MediaWiki::API v0.41 worries by Skeeve (Parson) on Mar 28, 2018 at 14:51 UTC
Because I do not know whether they are related. Just because I found this when searching for that doesn't mean that they are related in any way. `s$$([},&%#}/&/]+}%&{});#$&&s&&$^X.($'^"%]=\&(\|?{%` `+`.+=%;.#_}\&"^"-+%*).}%:##%}={~=~:.")&e&&s""`$''`"e	[reply] [d/l] [select]