Set a dynamic image on prototype cell?

Question

I want to display on "Profile" cell the image of the user. To do that I supposed to use the same snippet that solve the profile load.

First of all I declared an UIImageView! variable:

var accountimage: UIImageView!

Then, in my cellForRowAtIndexPath I downloaded by UserDefaults constructor the Avatar:

if indexPath.row == 1 {
    cell.backgroundColor? = UIColor(red: 236/255,green: 239/255,blue: 240/255,alpha: 1)
    let myFont: UIFont? = UIFont(name: "Avenir Next Condensed", size: 22.0)
    if let aFont = myFont {
        cell.textLabel?.font = aFont
        //load account image
        if UserDefaults.standard.object(forKey: "profile_avatar") != nil{
            let decoded  = UserDefaults.standard.object(forKey: "profile_avatar") as! Data
            let decodedTeams = NSKeyedUnarchiver.unarchiveObject(with: decoded)
            accountimage.image = decodedTeams as? UIImage
            cell.imageView?.image = accountimage.image
        } else
        {
            accountimage.image = #imageLiteral(resourceName: "user.png")
            cell.imageView?.image = accountimage.image
        }
}
}

Debugger says this on accountimage.image = decodedTeams as? UIImage line:

Thread 1: Fatal error: Unexpectedly found nil while unwrapping an Optional value

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Edit

Here a screen of my Main.Storyboard in case should be helpful:

Answer 1

Maybe you made a small mistake on this code let decoded = UserDefaults.standard.object(forKey: "profile_avatar") as! Data **as!**means forced conversion but may fail.