Debugging a Python Module in Visual Studio Code

I am attempting to debug code using Visual Studio Code. I have written a module 'Xchange'. I am able to run the module in the integrated terminal but I am presented with the following when attempting to run it with the debugger:

No module named Xchange

I have set the following configuration in launch.json:

{
 "name": "Python: Module",
 "type": "python",
 "request": "launch",
 "module": "Xchange",
 "console": "integratedTerminal",
 "cwd": "/Users/username/Documents/"
}

I had this working at one point, and do not believe I changed the config file. Any guidance or help would be greatly appreciated.