Run instantiates a MSSQL object, and runs the RPC server for the plugin
MSSQL is an implementation of Database interface
CreateUser generates the username/password on the underlying MSSQL secret backend as instructed by the CreationStatement provided.
RenewUser is not supported on MSSQL, so this is a no-op.
RevokeUser attempts to drop the specified user. It will first attempt to disable login, then kill pending connections from that user, and finally drop the user and login from the database instance.
Type returns the TypeName for this backend