appsettings.json

{
  "DatabaseConnectionConfigs": [
    {
      "Id": "SQLite",
      "ConnectionString": "Data Source=:memory:;version=3"
    },
    {
      "Id": "SQLServer",
      "ConnectionString": "Data Source=localhost;Initial Catalog=Whatever;user=sa;pwd=YourStrong@Passw0rd;encrypt=false"
    },
    {
      "Id": "PostgreSQL",
      "ConnectionString": "Server=localhost;Port=5432;Database=postgres;User Id=testuser;Password=testpass;Pooling=false;"
    },
    {
      "Id": "Oracle",
      "ConnectionString": "Data Source=//localhost:1521/FREEPDB1;User Id=k;Password=k;"
    },
    {
      "Id": "MySQL",
      "ConnectionString": "Server=127.0.0.1;Port=3306;Database=testdb;User Id=testuser;Password=testpass;"
    }
  ]
}