MM-13851 Added a UserWasCreated hook for server-side plugins (#10178)

app/user.go

@@ -28,6 +28,7 @@ import (
 	"github.com/mattermost/mattermost-server/einterfaces"
 	"github.com/mattermost/mattermost-server/mlog"
 	"github.com/mattermost/mattermost-server/model"
+	"github.com/mattermost/mattermost-server/plugin"
 	"github.com/mattermost/mattermost-server/services/mfa"
 	"github.com/mattermost/mattermost-server/utils"
 	"github.com/mattermost/mattermost-server/utils/fileutils"
@@ -212,6 +213,16 @@ func (a *App) CreateUser(user *model.User) (*model.User, *model.AppError) {
 	message.Add("user_id", ruser.Id)
 	a.Publish(message)
 
+	if pluginsEnvironment := a.GetPluginsEnvironment(); pluginsEnvironment != nil {
+		a.Srv.Go(func() {
+			pluginContext := a.PluginContext()
+			pluginsEnvironment.RunMultiPluginHook(func(hooks plugin.Hooks) bool {
+				hooks.UserHasBeenCreated(pluginContext, user)
+				return true
+			}, plugin.UserHasBeenCreatedId)
+		})
+	}
+
 	return ruser, nil
 }