An AWS Lambda function requires read access to an Amazon S3 bucket and requires read/write...

Attach the existing 1AM policy to the Lambda function.

Create an 1AM role for the Lambda function Attach the existing 1AM policy to the role Attach the role to the Lambda function

Create an 1AM user with programmatic access Attach the existing 1AM policy to the user. Add the user access key ID and secret access key as environment variables in the Lambda function.

Add the AWS account root user access key ID and secret access key as encrypted environment variables in the Lambda function