loadMissedMessages fails on a fresh server

Description:

After creating a fresh server without any users in it, the loadMissesMessage function fails because there are no registered users.

Steps to reproduce:

1. git clone
2. meteor npm install, meteor npm start
3. error

Expected behavior:

No error

Actual behavior:

I20200915-15:35:11.984(-4)? Exception while invoking method loadMissedMessages Error: Invalid user [error-invalid-user]
I20200915-15:35:11.985(-4)?     at MethodInvocation.loadMissedMessages (server/methods/loadMissedMessages.js:13:10)
I20200915-15:35:11.985(-4)?     at MethodInvocation.methodsMap.<computed> (app/lib/server/lib/debug.js:67:34)
I20200915-15:35:11.985(-4)?     at maybeAuditArgumentChecks (packages/ddp-server/livedata_server.js:1771:12)
I20200915-15:35:11.985(-4)?     at packages/ddp-server/livedata_server.js:1689:15
I20200915-15:35:11.985(-4)?     at Meteor.EnvironmentVariable.EVp.withValue (packages/meteor.js:1234:12)
I20200915-15:35:11.985(-4)?     at packages/ddp-server/livedata_server.js:1687:36
I20200915-15:35:11.986(-4)?     at new Promise (<anonymous>)
I20200915-15:35:11.986(-4)?     at Server.applyAsync (packages/ddp-server/livedata_server.js:1686:12)
I20200915-15:35:11.986(-4)?     at Server.apply (packages/ddp-server/livedata_server.js:1625:26)
I20200915-15:35:11.986(-4)?     at Server.call (packages/ddp-server/livedata_server.js:1607:17)
I20200915-15:35:11.986(-4)?     at Object.post (app/api/server/v1/misc.js:262:26)
I20200915-15:35:11.986(-4)?     at app/api/server/api.js:394:82
I20200915-15:35:11.986(-4)?     at Meteor.EnvironmentVariable.EVp.withValue (packages/meteor.js:1234:12)
I20200915-15:35:11.986(-4)?     at Object._internalRouteActionHandler [as action] (app/api/server/api.js:394:39)
I20200915-15:35:11.986(-4)?     at Route.share.Route.Route._callEndpoint (packages/nimble_restivus/lib/route.coffee:150:32)
I20200915-15:35:11.986(-4)?     at packages/nimble_restivus/lib/route.coffee:59:33
I20200915-15:35:11.986(-4)?     at packages/simple_json-routes.js:98:9
I20200915-15:35:11.987(-4)?  => awaited here:
I20200915-15:35:11.987(-4)?     at Promise.await (/Users/wreiske/.meteor/packages/promise/.0.11.2.1ixw4hn.8uhlk++os+web.browser+web.browser.legacy+web.cordova/npm/node_modules/meteor-promise/promise_server.js:60:12)
I20200915-15:35:11.987(-4)?     at Server.apply (packages/ddp-server/livedata_server.js:1638:22)
I20200915-15:35:11.987(-4)?     at Server.call (packages/ddp-server/livedata_server.js:1607:17)
I20200915-15:35:11.987(-4)?     at Object.post (app/api/server/v1/misc.js:262:26)
I20200915-15:35:11.987(-4)?     at app/api/server/api.js:394:82
I20200915-15:35:11.987(-4)?     at Meteor.EnvironmentVariable.EVp.withValue (packages/meteor.js:1234:12)
I20200915-15:35:11.987(-4)?     at Object._internalRouteActionHandler [as action] (app/api/server/api.js:394:39)
I20200915-15:35:11.987(-4)?     at Route.share.Route.Route._callEndpoint (packages/nimble_restivus/lib/route.coffee:150:32)
I20200915-15:35:11.987(-4)?     at packages/nimble_restivus/lib/route.coffee:59:33
I20200915-15:35:11.987(-4)?     at packages/simple_json-routes.js:98:9

Server Setup Information:

• Version of Rocket.Chat Server: 3.7.0-develop
• Operating System: macOS
• Deployment Method: git clone