[Intellij] Configure Go to Implementation with CNTRL+ Left Click

This is not available out of the box, We need to configure this with Quicklists and keymap  

1. Preferences/Settings-> Appearance & Behavior ->  "Quick Lists" 
2. Give a name and save it.
3. Add an action in the right side panel bottom (Click on the + at the bottom)
4. Add the Go to Declaration action (Main Menu > Navigate > Declaration )
5. Add the Go to Declaration action (Main Menu > Navigate > Implementation )
6. Click Apply
7. Go to Keymap in the settings
8. "Quick List" -> Add a shortcut with (COMMAND/CNTRL+Click)
9. If it is already assigned to something, do the needful.

Then you can try the shortcut