The API keys have to be inserted into the database manually in VIMP versions prior to 3.1.0.
Generate an unique API key of your choice and insert it into table api_auth (field 'apikey').
If table api_auth hasn't been created during a VIMP Enterprise or VIMP Enterprise Ultimate update from a previous version, create it as follows:
CREATE TABLE IF NOT EXISTS `api_auth` ( `apiid` int(11) NOT NULL AUTO_INCREMENT, `apikey` varchar(255) NOT NULL, `created_at` datetime NOT NULL, PRIMARY KEY (`apiid`), KEY `aa_i_username` (`apikey`) ) ENGINE=InnoDB;
