Update validated user list

{
  "type": "object",
  "required": [
    "action",
    "data",
    "result"
  ],
  "properties": {
    "action": {
      "type": "string",
      "description": "The id of the action",
      "enum": [
        "addUser"
      ]
    },
    "data": {
      "type": "object",
      "description": "list of users with their workflow settings",
      "required": [
        "isValidated",
        "userExists",
        "username"
      ],
      "properties": {
        "isValidated": {
          "type": "boolean",
          "description": "whether the user's actions generate chanque-request or not"
        },
        "userExists": {
          "type": "boolean",
          "description": "whether the user exists in file or not"
        },
        "username": {
          "type": "string"
        }
      }
    },
    "result": {
      "type": "string",
      "description": "Result of the request",
      "enum": [
        "success",
        "error"
      ]
    }
  }
}