toJson method
Creates a json from the object
Implementation
Map toJson() {
return {
'type': type,
'data': data,
'phone_number': phoneNumber,
'email': email,
'files': files,
'front_side': frontSide,
'reverse_side': reverseSide,
'selfie': selfie,
'translation': translation,
'hash': hash,
}..removeWhere((_, v) => v == null);
}