Integrate with acm-core

**Connect to acm-core**
Ability to export and import from acm-core

**Task List**
- [ ] cloud function to save event data upon workshop completion
- [ ] cloud function that would receive information from acm-core
- [ ] retrieve profile information from acm-core when user signs in
- [ ] after workshop user document in acm core should have record of their participation
- [ ] after workshop event document in acm core should have record of total number of participants who attended
- [ ] manual override option to edit whether a participant showed up or not and also for total attendance (perhaps a sync or override button in the UI for this)

**Additional context**
Integrate effectively with acm-core