ExAws.SQS.add_permission

You're seeing just the function add_permission, go back to ExAws.SQS module for more information.
Link to this function

add_permission(queue_url, label, permissions \\ %{})

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Specs

add_permission(
  queue_url :: binary(),
  label :: binary(),
  permissions :: sqs_acl()
) :: ExAws.Operation.Query.t()

Adds a permission with the provided label to the Queue for a specific action for a specific account.

AWS API Docs