First of all, I only want one database, not an extra silly little thing for credentials. I have read that this provider uses the UserProfiles table to store login credentials. I would like to use my Occupant table, and not have to link the two. Is this possible, and how do I do it?
If it must be UserProfile, could I perhaps inherit Occupant from that using EF inheritence features, so the provider sees only a UserProfile interface on my Occupant table?
You can change the name of the table to use in the WebSecurity.InitializeDatabaseConnection method. There is a parameter in this method called userTableName. If you have a different name for the user name column in the Occupant table then you would also specify that in the parameter userNameColumn. Also the identification column name used in your table would be specified in userIdColumn. There are techniques for including the SimpleMembership database with your your own database and the details depend upon if you are using the code-first or database-first approach. Out of the box SimpleMembership is code-first.