cognito.UserPool stack: jsii.errors.JSIIError: There is already a Construct with name '...' in App

[bodokaiser]

If I instance a class that extends aws_core.Stack where I instance a aws_cognito.UserPool in the constructor, I get jsii.errors.JSIIError: There is already a Construct with name 'foo-cognito' in App as an error on cdk deploy.

Reproduction Steps

Save to app.py:

from aws_cdk import (
  aws_cognito as cognito,
  core,
)

class CognitoStack(core.Stack):

  def __init__(self, app: core.App, id: str) -> None:
    super().__init__(app, id)

    userpool = cognito.UserPool(app, id,
      sign_in_type=cognito.SignInType.EMAIL,
    )

app = core.App()

CognitoStack(app, "foo-cognito")

app.synth()

Deploy via cdk deploy.

Error Log

cdk deploy
jsii.errors.JavaScriptError: 
  Error: There is already a Construct with name 'foo-cognito' in App
      at ConstructNode.addChild (/private/var/folders/0s/q8yw56tj7r5_clj45bpdpc7r0000gn/T/jsii-kernel-6ZB5Jm/node_modules/@aws-cdk/core/lib/construct.js:408:19)
      at new ConstructNode (/private/var/folders/0s/q8yw56tj7r5_clj45bpdpc7r0000gn/T/jsii-kernel-6ZB5Jm/node_modules/@aws-cdk/core/lib/construct.js:32:24)
      at new Construct (/private/var/folders/0s/q8yw56tj7r5_clj45bpdpc7r0000gn/T/jsii-kernel-6ZB5Jm/node_modules/@aws-cdk/core/lib/construct.js:448:21)
      at new Resource (/private/var/folders/0s/q8yw56tj7r5_clj45bpdpc7r0000gn/T/jsii-kernel-6ZB5Jm/node_modules/@aws-cdk/core/lib/resource.js:13:9)
      at new UserPool (/private/var/folders/0s/q8yw56tj7r5_clj45bpdpc7r0000gn/T/jsii-kernel-6ZB5Jm/node_modules/@aws-cdk/aws-cognito/lib/user-pool.js:134:9)
      at /Users/bodokaiser/.pyenv/versions/3.8.1/Python.framework/Versions/3.8/lib/python3.8/site-packages/jsii/_embedded/jsii/jsii-runtime.js:7838:49
      at Kernel._wrapSandboxCode (/Users/bodokaiser/.pyenv/versions/3.8.1/Python.framework/Versions/3.8/lib/python3.8/site-packages/jsii/_embedded/jsii/jsii-runtime.js:8301:19)
      at Kernel._create (/Users/bodokaiser/.pyenv/versions/3.8.1/Python.framework/Versions/3.8/lib/python3.8/site-packages/jsii/_embedded/jsii/jsii-runtime.js:7838:26)
      at Kernel.create (/Users/bodokaiser/.pyenv/versions/3.8.1/Python.framework/Versions/3.8/lib/python3.8/site-packages/jsii/_embedded/jsii/jsii-runtime.js:7585:21)
      at KernelHost.processRequest (/Users/bodokaiser/.pyenv/versions/3.8.1/Python.framework/Versions/3.8/lib/python3.8/site-packages/jsii/_embedded/jsii/jsii-runtime.js:7372:28)
      at KernelHost.run (/Users/bodokaiser/.pyenv/versions/3.8.1/Python.framework/Versions/3.8/lib/python3.8/site-packages/jsii/_embedded/jsii/jsii-runtime.js:7312:14)
      at Immediate._onImmediate (/Users/bodokaiser/.pyenv/versions/3.8.1/Python.framework/Versions/3.8/lib/python3.8/site-packages/jsii/_embedded/jsii/jsii-runtime.js:7315:37)
      at processImmediate (internal/timers.js:456:21)

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "app.py", line 20, in <module>
    CognitoStack(app, "foo-cognito")
  File "/Users/bodokaiser/.pyenv/versions/3.8.1/Python.framework/Versions/3.8/lib/python3.8/site-packages/jsii/_runtime.py", line 66, in __call__
    inst = super().__call__(*args, **kwargs)
  File "app.py", line 15, in __init__
    userpool = cognito.UserPool(app, id,
  File "/Users/bodokaiser/.pyenv/versions/3.8.1/Python.framework/Versions/3.8/lib/python3.8/site-packages/jsii/_runtime.py", line 66, in __call__
    inst = super().__call__(*args, **kwargs)
  File "/Users/bodokaiser/.pyenv/versions/3.8.1/Python.framework/Versions/3.8/lib/python3.8/site-packages/aws_cdk/aws_cognito/__init__.py", line 5215, in __init__
    jsii.create(UserPool, self, [scope, id, props])
  File "/Users/bodokaiser/.pyenv/versions/3.8.1/Python.framework/Versions/3.8/lib/python3.8/site-packages/jsii/_kernel/__init__.py", line 224, in create
    response = self.provider.create(
  File "/Users/bodokaiser/.pyenv/versions/3.8.1/Python.framework/Versions/3.8/lib/python3.8/site-packages/jsii/_kernel/providers/process.py", line 333, in create
    return self._process.send(request, CreateResponse)
  File "/Users/bodokaiser/.pyenv/versions/3.8.1/Python.framework/Versions/3.8/lib/python3.8/site-packages/jsii/_kernel/providers/process.py", line 318, in send
    raise JSIIError(resp.error) from JavaScriptError(resp.stack)
jsii.errors.JSIIError: There is already a Construct with name 'coopsaas-cognito' in App
Subprocess exited with error 1

Environment

• CLI Version : aws-cli/2.0.0 Python/3.8.1 Darwin/19.3.0 botocore/2.0.0dev4 - Framework Version: 1.24.0 (build 6619e36)
• OS : macOS Catalina
• Language : English (US)

Other

Possible related or similar issues:

• Multiple Assets In the same stack #706
• Multiple S3SourceActions returns "already a Construct with name" error #4237

---

This is 🐛 Bug Report

[bodokaiser]

The second argument to cognito.UserPool has to be the name of the user pool and not the stack id. This caused the error.