This error typically means that the UID and subtenant ID are not configured correctly thus Atmos is unable to lookup the corresponding secret key associated with the UID.  In the Atmos Online portal these credentials are referred to as the "Full Token ID."  It consists of the subtenant_id/user_id.  Notice the slash separating the two.   Use these individual parts separated by the slash in the GeoDrive configuration that asks for a Subtenant ID and User ID. 
Hi Developers, As a proof of concept I am trying to use Atmos GeoDrive against Atmos online developer account, for which I am receiving error..Atmos:1033 -UNABLE TO RETRIEVE THE SECRET KEY FOR THE SPECIFIED USER. http: 403 - THE SERVER UNDERSTOOD THE REQUEST, BUT CANNOT FULFILL IT. Can you please help me to resolve this error? Thanks!
GeoDrive and Atmos online