Added API to return user count bands and user count (#25796)

server/channels/api4/limits.go

@@ -0,0 +1,34 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package api4
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"github.com/mattermost/mattermost/server/public/model"
+
+	"github.com/mattermost/mattermost/server/public/shared/mlog"
+)
+
+func (api *API) InitLimits() {
+	api.BaseRoutes.Limits.Handle("/users", api.APISessionRequired(getUserLimits)).Methods("GET")
+}
+
+func getUserLimits(c *Context, w http.ResponseWriter, r *http.Request) {
+	if !(c.IsSystemAdmin() && c.App.SessionHasPermissionTo(*c.AppContext.Session(), model.PermissionSysconsoleReadUserManagementUsers)) {
+		c.SetPermissionError(model.PermissionSysconsoleReadUserManagementUsers)
+		return
+	}
+
+	userLimits, err := c.App.GetUserLimits()
+	if err != nil {
+		c.Err = err
+		return
+	}
+
+	if err := json.NewEncoder(w).Encode(userLimits); err != nil {
+		c.Logger.Error("Error writing user limits response", mlog.Err(err))
+	}
+}