To Do:
- Member has_many donations (add member_id to donations)
- Add one-off/recurring_donation boolean to donations
- Member can create one_off & recurring donations
- Figure out how to allow stripe to accept regular donations w/ self assigned amount
- Member has_one recurring_donation
- Member can cancel recurring donation
- User can create one_off donation
- User can not create recurring donation
- make sure correct amount is being converted