Changes to Deletes all files and versions for the specified user.

api operation id userFiles_DeleteUserFiles removed and replaced with userFiles_DeleteFilesByUserNameAndUserId

added the non-success response with the status 400

added the non-success response with the status 401

added the non-success response with the status 404

deleted the header request parameter Authorization

the endpoint scheme security oauth2 was added to the API

api operation id DeleteUserFiles removed and replaced with userFiles_DeleteUserFiles