title: I am getting error while building aws cdk rds **Stack failed: ValidationError: Given input did not match expected format
body: <p>I am getting error while building rds instance using typescript langauge:
  Error :
  Argument of type '{ engine: DatabaseInstanceEngine; vpc: Vpc; vpcPlacement: { subnetType: SubnetType.ISOLATED; }; storageEncrypted: true; multiAz: false; autoMinorVersionUpgrade: false; ... 8 more ...; port: number; }' is not assignable to parameter of type 'DatabaseInstanceProps'. Object literal may only specify known properties, and 'instanceClass' does not exist in type 'DatabaseInstanceProps'.</p>
  <p><img src="https://i.stack.imgur.com/TU11C.jpg" alt="enter image description here" /></p>
  <p><img src="https://i.stack.imgur.com/6SJQA.jpg" alt="enter image description here" /></p>
  <p><img src="https://i.stack.imgur.com/PEVDm.jpg" alt="enter image description here" /></p>
  <p><a href="https://i.stack.imgur.com/L005A.jpg" rel="nofollow noreferrer">enter image description here</a></p>