Message.class -> field "To" - should be type of List<String>

[Bryksin]

Hi

According to the official documentation field to is a an array which can take multiple tokens

the example provided in the official documentation:

[
  {
    "to": "ExponentPushToken[xxxxxxxxxxxxxxxxxxxxxx]",
    "sound": "default",
    "body": "Hello world!"
  },
  {
    "to": "ExponentPushToken[yyyyyyyyyyyyyyyyyyyyyy]",
    "badge": 1,
    "body": "You've got mail"
  },
  {
    "to": [
      "ExponentPushToken[zzzzzzzzzzzzzzzzzzzzzz]",
      "ExponentPushToken[aaaaaaaaaaaaaaaaaaaaaa]"
    ],
    "body": "Breaking news!"
  }
]

look at the 3d message in the list, it has multiple tokens