Flutter add padding to Textfield hinttext

How do i add a padding to the textfield hint text so it has a gap between the icon box?

Currently it is like this:

Where the result that I am achieving for:

This is the code snippet:

Padding(
  padding: EdgeInsets.only(top: 56.0),
  child: TextField(
    decoration: InputDecoration(
    prefixIcon: Container(
       padding: EdgeInsets.all(10.0),
       decoration: BoxDecoration(
          color: Color(0xFFE7ECEF), 
          borderRadius: BorderRadius.only(
             topLeft: Radius.circular(5.0),
             topRight: Radius.zero,
             bottomLeft: Radius.circular(5.0),
             bottomRight: Radius.zero,
          ),
          border: Border.all(
             color: Color(0xFFCDCDCF),
             width: 2.0,
          )
       ),
       child: Icon(MdiIcons.account, color: Colors.black),
    ),
    hintText: 'Username',
    focusedBorder: OutlineInputBorder(
    borderRadius: BorderRadius.circular(5.0),
    borderSide: BorderSide(
       color: Color(0xFFCDCDCF),
       width: 2.0,
    ),
  ),
  enabledBorder: OutlineInputBorder(
    borderRadius: BorderRadius.circular(5.0),
    borderSide: BorderSide(
       color: Color(0xFFCDCDCF), // Set your desired border color
       width: 2.0, // Set your desired border thickness
    ),
  ),
  contentPadding: EdgeInsets.all(10.0),
),),),

You just have to add margin in Container...

Here is the Updated Code

TextField(
    decoration: InputDecoration(
      prefixIcon: Container(
/*---*/ margin: const EdgeInsets.only(right:15.0),
        padding: const EdgeInsets.all(10.0),
        decoration: BoxDecoration(
          color: const Color(0xFFE7ECEF),
          borderRadius: const BorderRadius.only(
            topLeft: Radius.circular(5.0),
            topRight: Radius.zero,
            bottomLeft: Radius.circular(5.0),
            bottomRight: Radius.zero,
          ),
          border: Border.all(
            color: const Color(0xFFCDCDCF),
            width: 2.0,
          ),
        ),
        child: const Icon(Icons.person, color: Colors.black),
      ),
      hintText: 'Username',
      focusedBorder: OutlineInputBorder(
        borderRadius: BorderRadius.circular(5.0),
        borderSide: const BorderSide(
          color: Color(0xFFCDCDCF),
          width: 2.0,
        ),
      ),
      enabledBorder: OutlineInputBorder(
        borderRadius: BorderRadius.circular(5.0),
        borderSide: const BorderSide(
          color: Color(0xFFCDCDCF), // Set your desired border color
          width: 2.0, // Set your desired border thickness
        ),
      ),
      contentPadding: const EdgeInsets.all(10.0),
    ),
  ),

Result