Simulate Update User button click

Thanks must go to WebElaine as her comment lead me on the right path to solving this.

The issue was when the pmprommpu_addMembershipLevel() adds the membership level it sets the endate to 0000-00-00 00:00:00 running a $wpdb->update to set this to NULL fixed the problem.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)