Rocket.Chat/server/startup/migrations/v12.coffee

Meteor.startup ->
	Migrations.add
		version: 12
		up: ->
			# Set oldest user as admin, if none exists yet
			admin = RocketChat.models.Users.findOneAdmin true, { fields: { _id: 1 } }
			unless admin
				# get oldest user
				oldestUser = RocketChat.models.Users.findOne({}, { fields: { username: 1 }, sort: {createdAt: 1}})
				if oldestUser
					Meteor.users.update {_id: oldestUser._id}, {$set: {admin: true}}

					console.log "Set #{oldestUser.username} as admin for being the oldest user"