What is the UsersConnectionRepository for in Spring Social Facebook?
Yep from the docs ~ For convenience is bootstrapping the schema from a running application, this schema definition is available in the spring-social-core module as a resource at the path /org/springframework/social/connect/jdbc/JdbcUsersConnectionRepository.sql.
From herehttp://static.springsource.org/spring-social/docs/1.0.x/reference/html/serviceprovider.html
You might want to take a look at the sample apps here