How do I align prefixIcon with text on textFormField?

I have the following code for my textFormField:

 Container(
                  alignment: Alignment.centerLeft,
                  height: media.height * 0.12,
                  decoration: txtFieldBoxDecoration,
                  child: TextFormField(
                    textAlignVertical: TextAlignVertical.center,
                    keyboardType: TextInputType.emailAddress,
                    style: const TextStyle(
                      color: Colors.white,
                      fontSize: 26,
                    ),
                    decoration: InputDecoration(
                      border: InputBorder.none,
                      contentPadding: const EdgeInsets.only(top: 14),
                      prefixIcon: const Icon(
                        Icons.email,
                        color: Colors.white,
                        size: 28,
                      ),
                      hintText: 'Insira seu E-mail',
                      hintStyle: GoogleFonts.openSans(
                          color: Colors.white54, fontSize: 26),
                    ),
                    onChanged: (value) {},
                  ),
                ),

And I'm getting the following result:

How do I align the prefix Icon and the hintText like this: