Device with Grove Dust sensor

I am tryind to built a device which calculates PM2.5. I watched a tutorial video on Youtube for Sense Your City Sense Your City: DIY Sensor Workshop - YouTube . I have already bought all the pieces (sensors, seeeduino and base shield) but I have a problem. I followed the instructions but i can't get privete ID and private Key from . It shows me a messagr that says "Oops, please try again in a bit" . So I can't have a private ID and a private Key. Could you please give me a solution or give me an other way to see the measurements? Is there any other code I can use?
Thank you!