title: Flutter how to add padding in TextFormField?
body: <p>I hope the title is enough to understand what i want, How to add padding and margin in TextFormField? please see picture below for more information. thanks</p>
  <pre><code>      child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: &lt;Widget&gt;[
            Image.asset('assets/images/logo.png'),
            TextFormField(
              decoration: InputDecoration(
                  fillColor: Colors.white,
                  filled: true,
                  border: new OutlineInputBorder(
                    borderRadius: const BorderRadius.all(
                      const Radius.circular(10.0),
                    ),
                  ),
                  labelText: 'Enter your username'),
            ),
            TextFormField(
              decoration: InputDecoration(
                  fillColor: Colors.white,
                  filled: true,
                  border: new OutlineInputBorder(
                    borderRadius: const BorderRadius.all(
                      const Radius.circular(10.0),
                    ),
                  ),
                  labelText: 'Enter your password'),
            ),
          ],
        )
  </code></pre>
  <p><a href="https://i.stack.imgur.com/JjM9q.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/JjM9q.png" alt="enter image description here" /></a></p>