Quando eu vou no Register e informo o usuario e senha esta dando Erro

System.Data.SqlClient.SqlException: 'A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 50 - Local Database Runtime error occurred. A instância LocalDB especificada não existe.
)'

Sendo que eu fiz as modificação de banco com banco aqui do meu Computador appsettings.json

{
  "ConnectionStrings": {
    "ListaLeitura": "Server=(localdb)\\DESKTOP-4OK2311;Database=AluraListaLeitura;Trusted_Connection=True;MultipleActiveResultSets=true",
    "AuthDB": "Server=(localdb)\\MSSQLLocalDB;Database=AuthDb;Trusted_Connection=True;MultipleActiveResultSets=true"
  }
}

Tem alguém ai pode me ajudar ?