login method Null safety

String login(
  1. String username,
  2. String password
)

Returns the graphQL mutation to login.

Implementation

static String login(String username, String password) {
  String ret = '''
mutation LogIn{
logIn(input: {
  username: "$username"
  password: "$password"
}){
  viewer{
    sessionToken
  }
}
}
''';
  return ret;
}