Single log stream for API Gateway

Serverless Framework
,
1

Hello,
I here is part of my serverless.yml:

provider:
  timeout: 30
  name: aws
  runtime: nodejs10.x
  memorySize: 256
  profile: ej
  stage: dev
  region: eu-west-1
  apiKeys:
    - ${opt:stage}-esProxy
  logRetentionInDays: 14
  logs:
    restApi: true
    role: arn:aws:iam::#{AWS::AccountId}:role/api-gateway-role
  tracing:
    apiGateway: true

i have enabled the logs and this sends logs into cloudwatch single log group, but then it writes many log streams.

is there a way to configure and set the log stream to write this into?

any advice is much appreciated