create custom authorizer within CLI - manually created authorizer will be overwritten

**Is your feature request related to a problem? Please describe.**

Yes, I am unable to configure a custom authorizer (cognito) with the CLI, and also unable to use the CLI to set my api gateway to use COGNITO_USER_POOLS

**Describe the solution you'd like**
something similar to the suggestion in this closed (inactivity) issue:
https://github.com/aws-amplify/amplify-js/issues/1702

Authorizer:
Name: CustomerCognitoAuthorizer
Type: COGNITO_USER_POOLS
ProviderARNs:
- !Ref CustomerCognitoPoolARN
IdentitySource: "method.request.header.Authorization"

**Describe alternatives you've considered**
A clear and concise description of any alternative solutions or features you've considered.

**Additional context**
I've tried to manually created the "custom authorizer", but every time I amplify push it will get overwritten/removed.

amplify-API docs mention:

"Cognito User Pools Authorization
You can use the JWT token provided by the Authentication API to authenticate against API Gateway directly when using a custom authorizer."
.
..but I can't find a way to create this custom authorizer in the CLI.
Am I just going about this the wrong way??

Start by reviewing the Amplify CLI API configuration and the Cognito User Pools authorization documentation referenced in the issue. Determine how a custom authorizer can be represented without being removed during amplify push, then verify that the configured API Gateway authorizer and COGNITO_USER_POOLS settings persist after deployment.

Written by the indexing model from the issue text.