const connectionConfig = {
    client: 'mysql', //or 'pg' for postgres
    connection: {
      host: 'some-data-uri',
      port: '9999',
      user: 'user',
      password: 'password',
      database: 'databaseSchema'
    },
    pool: {
      // minimum size
      min: 2,
      // maximum size
      max: 10,
      // acquire promises are rejected after this many milliseconds
      // if a resource cannot be acquired
      acquireTimeoutMillis: 30000,
      // create operations are cancelled after this many milliseconds
      // if a resource cannot be acquired
      createTimeoutMillis: 3000,
      // destroy operations are awaited for at most this many milliseconds
      // new resources will be created after this timeout
      destroyTimeoutMillis: 5000,
      // free resouces are destroyed after this many milliseconds
      idleTimeoutMillis: 30000,
      // how often to check for idle resources to destroy
      reapIntervalMillis: 1000,
      // long long to idle after failed create before trying again
      createRetryIntervalMillis: 200
      // ping: function (conn, cb) { conn.query('SELECT 1', cb) }
    },
    debug: false
  }