-type access_key_id() :: binary().
-type aws_client() :: map().
-type http_port() :: binary().
-type region() :: binary().
-type secret_access_key() :: binary().
-type token() :: binary().
-spec make_client() -> aws_client().
-spec make_client(region()) -> aws_client().
-spec make_client(access_key_id(), secret_access_key(), region()) ->
aws_client().
-spec make_local_client(access_key_id(),
secret_access_key(),
http_port()) ->
aws_client().
-spec make_temporary_client(access_key_id(),
secret_access_key(),
token(),
region()) ->
aws_client().