Login create session only available with username not email

{
  "checks": {
    "user": {
      "loginName": "<<Email>>@gmail.com"
    },
    "password": {
      "password": "<<USER_PASSWORD>>"
    }
  },
  "lifetime": "18000s"
}

{
  "code": 5,
  "details": [
    {
      "@type": "type.googleapis.com/zitadel.v1.ErrorDetail",
      "id": "QUERY-Dfbg2",
      "message": "User could not be found"
    }
  ]
}