Divider in AppBar not appearing - flutter

Question

I am struggling to figure out why my divider in my app bar is not appearing. When I increase the height of the divider, I notice my widgets move up. I looked at similar issues and none have worked. My appBar consists of two columns and one row for the user profile information and information on their "Partner". I wanted to use the divider to separate the partner name and username from the win/loss ratio.strong text
Widget build(BuildContext context) {
final user = Provider.of<User>(context);
return Scaffold(
appBar: AppBar(
backgroundColor: Color(0xFF2430346),
bottom: PreferredSize(
preferredSize: const Size.fromHeight(100.0),
child: Row(
children: <Widget>[
Expanded(
child: Padding(
padding: const EdgeInsets.only(left:20.0),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
_buildUserInfo(user),
Text(
"#username",
style: new TextStyle(
fontSize: 14,
fontWeight: FontWeight.w600,
color: Colors.white,
)
)
],
),
),
),
Padding(
padding: const EdgeInsets.only(right:70.0),
child: Expanded(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(
"My Partner",
style: new TextStyle(
fontSize: 24,
fontWeight: FontWeight.w600,
color: Colors.white,
),
),
Text(
"Dorian",
style: new TextStyle(
color: Colors.white,
),
),
Text(
"#Doetheman",
style: new TextStyle(
color: Colors.white,
),
),
// Mfer aint appearing
Padding(
padding: const EdgeInsets.only(left: 16, right: 16, top: 10, bottom: 10),
child: Divider(
height: 2.0,
color: Colors.white,
),
),
],
),
),
),
],
),
),
),
),
Widget _buildUserInfo(User user) {
return Column(
children: [
Avatar(
photoUrl: user.photoUrl,
radius: 40,
borderColor: Colors.black54,
borderWidth: 2.0,
),
const SizedBox(height: 8),
if (user.displayName != null)
Text(
user.displayName,
style: TextStyle(color: Colors.white),
),
const SizedBox(height: 8),
],
);
}
}
What I want it to look in view:
enter image description here

Answer 1

Instead of divider you can use container like this
Container(
alignment: Alignment.center,
width: 250,
height: 1,
color: Colors.black
),

Answer 2

Use IntrinsicWidth widget to wrap Column
IntrinsicWidth(
child: Column(
children: [
// ....
Divider(),
],
),
)