Establish Relationships Between `Company` and `CompanyUser`

[ ] Define foreign key relationships between Company and CompanyUser.
[ ] Ensure that when a company is created, a corresponding admin user is created and linked.
[ ] Add the necessary navigation properties to link the entities.
[ ] Create a migration to update the relationships in the database.
[ ] Update the database to apply the migration.

-edit the Identity User will be called CompanyUser not Account User

seanbsu / ChartCare