Sign out user from dropbox website with an API call

BIMcollab As Здравко mentioned, you can direct the user to https://www.dropbox.com/logout at any time to log them out of the Dropbox web site. Make sure you do so with the user's understanding though, as forcibly logging them out without their knowledge may be confusing or disruptive to them.

Or, you can use the 'forceReapprove' or 'forceReauthentication' parameter on the GetAuthorizeUri method to require the user to explicitly re-authorize the app (giving them a chance to switch accounts, if they wish) or log the user out, respectively, during the app authorization flow. (Apologies, the docs there seem to be missing the full description of these parameters. I'll ask the team to fix that up. In the meantime you can find the corresponding documentation in the HTTP docs here.)