TableView is not populating after populated from loaded array - arrays

Question

I have read through the similar questions, but am still stuck.
I have an array in a separate swift file called getSkills. It connects to a Firebase database and returns the skills into a variable/array called mySkills.
func getSkills(owner: String) {
mySkills = []
let db = Firestore.firestore()
db.collection("Skills").order(by: "SkillName").getDocuments { (querySnapshot, error) in
if let e = error {
print(e)
//TO DO: show error on screen
} else {
if let safeDocs = querySnapshot?.documents {
for doc in safeDocs {
let data = doc.data()
if let sklName = data["SkillName"] as? String,
let sklType = data["SkillType"] as? String,
let sklLevel = data["SkillLevel"] as? String,
let sklIsTimed = data["isTimed"] as? Bool,
let sklSecs : Int = data["Seconds"] as? Int,
let sklOwner = data["Owner"] as? String,
let sklID = doc.documentID as? String {
let newSkill = Skill(id: sklID, name: sklName, type: sklType, isTimed: sklIsTimed, seconds: sklSecs, level: sklLevel, owner: sklOwner)
mySkills.append(newSkill)
}
}
}
}
}
}
In a separate swift view controller, I am calling the getSkills function in ViewDidLoad.
override func viewDidLoad() {
super.viewDidLoad()
skillList.dataSource = self
skillList.delegate = self
DispatchQueue.main.async {
getSkills(owner: getUserID())
print(mySkills.count)
self.skillList.reloadData()
}
However, when the View Controller displays in the simulator the tableview is not populated with the list of Skills.
I can get the issue to work with a "LoadData()" function in the View Controller. However, I'm trying to build a reusable getSkills function that I can call in multiple locations as opposed to writing the same code over and over.
I've tried the following things:
Dispatch Main Queue in the getSkills function
Dispatch main queue in the ViewController itself
Moving the Dispatch main queue lines to the ViewWillAppear function on the ViewController.
wrapping the mySkills.append in the getSkills function within Dispatch Main Queue
Any ideas?