Ok so just as I said previously... replace the code what you got in OnSelect property with
Right so you didn't create a connection to your database. Follow the instruction (option1) I have send you previously. If you do it corrctly you will have the datasorce listed there with blue icon (as you can see it on my picture) and name H. If the name is different you will have to change it also in your OnSellect property Patch
File -> Connections..
then from your web borwser
Create a connection -> Chose OneDrive (or OneDrive for busineses) -> Log in
...and so on