Flutter change password - flutter

Question

I want to make a change password in my app using mysql but i dont know how to get the specific logged in id to change my password i have a dash board i am using cards on it so when i click the card with a name change password it will redirect
to this page i am using a mysql for my localdatabase.
Widget build(BuildContext context) {
return Scaffold(
resizeToAvoidBottomInset: false,
appBar: AppBar(
title: Text('Change Password'),
backgroundColor: Color(0xff083663),
),
body: Form(
key: _key,
child: Center(
child: Column(
children: <Widget>[
SizedBox(
height: 30.0,
),
Padding(
padding: EdgeInsets.symmetric(vertical: 16.0, horizontal: 16.0),
child: Container(
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'Change Password',
style: TextStyle(
fontSize: 18.0, fontWeight: FontWeight.w900),
)
],
),
),
),
SizedBox(
height: 10.0,
),
//This is the field where you will enter the Current Password
Padding(
padding: EdgeInsets.symmetric(vertical: 16.0, horizontal: 16.0),
child: TextFormField(
validator: (e) {
if (e.isEmpty) {
return "Please Enter Current Password";
}
return null;
},
obscureText: _secureText1,
onSaved: (e) => c1 = e,
decoration: InputDecoration(
labelText: 'Current Password',
suffixIcon: IconButton(
onPressed: showHide,
icon: Icon(_secureText1
? Icons.visibility_off
: Icons.visibility),
),
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(
color: Color(0xff083663),
)),
border: OutlineInputBorder()),
),
),
SizedBox(
height: 10.0,
),
Padding(
padding: EdgeInsets.symmetric(vertical: 16.0, horizontal: 16.0),
child: TextFormField(
validator: (e) {
if (e.isEmpty) {
return "Please Enter New Password";
}
return null;
},
obscureText: _secureText2,
onSaved: (e) => c2 = e,
decoration: InputDecoration(
labelText: 'New Password',
suffixIcon: IconButton(
onPressed: showHide2,
icon: Icon(_secureText2
? Icons.visibility_off
: Icons.visibility),
),
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(
color: Color(0xff083663),
)),
border: OutlineInputBorder()),
),
),
// this is the field for the verify password
Padding(
padding: EdgeInsets.symmetric(vertical: 16.0, horizontal: 16.0),
child: TextFormField(
validator: (e) {
if (e.isEmpty) {
return "Verify Password";
}
return null;
},
onSaved: (e) => c3 = e,
keyboardType: TextInputType.number,
decoration: InputDecoration(
labelText: 'Verify Password',
suffixIcon: IconButton(
onPressed: showHide3,
icon: Icon(_secureText3
? Icons.visibility_off
: Icons.visibility),
),
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(
color: Color(0xff083663),
)),
border: OutlineInputBorder()),
),
),
Padding(
padding: EdgeInsets.symmetric(vertical: 16.0, horizontal: 16.0),
child: Divider(),
),
SizedBox(
height: 20.0,
),
Container(
height: 50,
width: 250,
child: RaisedButton(
onPressed: () {
check();
},
color: Color(0xffb5171d),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.all(Radius.circular(30.0))),
textColor: Colors.white,
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Icon(
Icons.vpn_key,
color: Colors.white,
),
Text(
'Save Changes',
style: TextStyle(fontSize: 15),
),
SizedBox(
height: 20,
)
],
),
),
),
],
),
),
),
);
}
}