CREATE TABLE IF NOT EXISTS Messages(
        messageID INT(255) PRIMARY KEY AUTO_INCREMENT NOT NULL,
        date_time TIMESTAMP NOT NULL,
        mess_text VARCHAR(255) NOT NULL,
        source INT(255) NOT NULL,
        destination_user INT(255),
        destination_group INT(255),
        stato ENUM("Sent","Recieved","Read") NOT NULL,
        FOREIGN KEY (source) REFERENCES users(userID),
        FOREIGN KEY (destination_user) REFERENCES Users(userID),
        FOREIGN KEY (destination_group) REFERENCES Groups(groupID)
    )engine=InnoDB