Feature summary (what you would like to be able to do and where):

Get the local user ID from the API with a single call using meta=globaluserinfo. Currently the API already provides the information of each local account that was unified, however the local ID is not provided.

Example:

{
  "wiki": "mediawikiwiki",
  "url": "https://www.mediawiki.org",
  "timestamp": "2014-10-08T20:34:48Z",
  "method": "login",
  "editcount": 150,
  "registration": "2014-10-08T20:34:47Z",
  "groups": [
    "autopatrolled"
  ]
}

Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):

• The Outreach Dashboard updated their CSV of users enrolled in programs, adding the users' global user ID: T322662. It is an important measure to avoid conflicts after a user renaming, as this ID is not modified by that.
• The action=compare (and other parts of the API), on the other hand, only work using the username and the local ID.
• The only way I could figure it out is to use meta=globaluserinfo, collect the username (which I would like to avoid for the beginning) and then use list=users to convert the name to the local ID.

Benefits (why should this be implemented?):
If it were possible to do this directly with globaluserinfo, it would be possible:

• Getting this information with just a single API call.
• Avoid possible inconsistencies when using usernames that are occasionally renamed.

Relevant pictures: