# Get active user count

Returns the count of unique users who performed a specific feed operation within the time window.

RBAC:
- requires ANY of Jobs.Read, Jobs.Manage

Endpoint: GET /api/v1/admin/feed/metrics/user-count-single
Version: 1.0
Security: header

## Query parameters:

  - `operation` (string, required)
    Feed operation to count users for
    Enum: "populate", "merge", "unmerge", "redis", "redisLex", "cache", "idsDb", "db", "add", "remove"

  - `window` (string, required)
    Time window to count active users within
    Enum: "TEN_MINUTES", "ONE_HOUR", "TWENTY_FOUR_HOURS"

## Response 200 fields (application/json):

  - `operation` (string, required)
    Enum: "populate", "merge", "unmerge", "redis", "redisLex", "cache", "idsDb", "db", "add", "remove"

  - `userCount` (integer, required)

## Response 403 fields (application/json):

  - `errorCode` (string, required)
    Error code

  - `message` (string, required)
    Error message

  - `docUrl` (string)
    Link to documentation