To query all events:
SELECT * FROM events;
To select all user details for each member:
SELECT * FROM Members
However, I don't think that what you asked was what you wanted, did you perhaps want to JOIN the tables on the foreign key? That would be something like this:
SELECT e.id AS event_id, e.title, e.start, e.end, m.id AS user_id, m.username, m.password, m.fullname
FROM events
LEFT JOIN Members m on m.id = e.userid