Slack deprecation of Files.upload API #67
Description
Files.upload API will be retired on March 11, 2025
Any new applications created on or after this date will be prevented from invoking the files.upload API. Full deprecation will take place on March 11, 2025. To prepare for this change, we recommend migrating away from files.upload and instead using the combination of files.getUploadURLExternal and files.completeUploadExternal. More information on how to use these two APIs together can be found on our Uploading files documentation.