{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "member": {
      "type": "string"
    },
    "addedAt": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ]
    }
  },
  "required": ["member", "addedAt"],
  "additionalProperties": {},
  "title": "Group member",
  "description": "addedAt is null when Relay has no record of when they joined."
}