When i try these command got error like below

ExAws.S3.list_objects("bucket_name") |> ExAws.request(region: "my_region")

** (ArgumentError) expected a keyword list, but an entry in the list is not a two-element tuple with an atom as its first element, got: {“content-length”, 0}
(elixir 1.11.0) lib/keyword.ex:475: Keyword.keys/1
(ex_aws 1.1.5) lib/ex_aws/auth.ex:111: ExAws.Auth.build_canonical_request/5
(ex_aws 1.1.5) lib/ex_aws/auth.ex:96: ExAws.Auth.signature/8
(ex_aws 1.1.5) lib/ex_aws/auth.ex:87: ExAws.Auth.auth_header/7
(ex_aws 1.1.5) lib/ex_aws/auth.ex:39: ExAws.Auth.headers/6
(ex_aws 1.1.5) lib/ex_aws/request.ex:27: ExAws.Request.request_and_retry/7
(ex_aws 1.1.5) lib/ex_aws/operation/s3.ex:40: ExAws.Operation.ExAws.Operation.S3.perform/2

ExAws.Config.new(:s3)

When i try these command it return my key and secret_access_key that all are correct.

Please suggest me how to do this thing done