Merge API entity into one package

[ianpogi5]

Motivation: As of writing, abu-api- will consume 199 resources. Since the limit is 200, the user cannot create more API endpoints.

Proposed Solution: Merge API entity into one lambda function.

A new file src/index.js will be the one to route to the individual functions.

function.yml

admin-access:
  handler: src/index.handler
  events:
    - http:
        path: /
        method: post
        authorizer:
          type: COGNITO_USER_POOLS
          authorizerId:
            Ref: ApiGatewayAuthorizer
        cors: true
    - http:
        path: /{id}
        method: get
        authorizer:
          type: COGNITO_USER_POOLS
          authorizerId:
            Ref: ApiGatewayAuthorizer
        cors: true
    - http:
        path: /
        method: get
        authorizer:
          type: COGNITO_USER_POOLS
          authorizerId:
            Ref: ApiGatewayAuthorizer
        cors: true
    - http:
        path: /{id}
        method: put
        authorizer:
          type: COGNITO_USER_POOLS
          authorizerId:
            Ref: ApiGatewayAuthorizer
        cors: true
    - http:
        path: /{id}
        method: patch
        authorizer:
          type: COGNITO_USER_POOLS
          authorizerId:
            Ref: ApiGatewayAuthorizer
        cors: true
    - http:
        path: /{id}
        method: delete
        authorizer:
          type: COGNITO_USER_POOLS
          authorizerId:
            Ref: ApiGatewayAuthorizer
        cors: true

Pros:

• Use only 1 lambda instead of multiple thus reducing the resources.
• Because we'll be using one lambda for list and CRUD, the lambda maybe kept warm while user is using the endpoint.

Cons:

• Code is bigger because all operations are inside.