Slack will be deprecating the files.upload method for their API. In its place will be a new 3 step process. I’ve been successful executing Step 1 and Step 2 with Postman making calls to the Slack API. I’ve been successful executing Step 1 while making calls to the Slack API with my Java code. I have not been successful with Step 2 making calls to the Slack API with my Java code. I was hopeful to get some help with my Step 2 Java code.