a way to store environment variable for custom package

- If the instance is hosted in the cloud one way of doing it would be ask Sugar if they can set the variabel in the config. 

- We used the connector part for it in the past. So we created a 'dummy' connector where we can set the settings we need

- now we use our own configuration module that stores the settings in the configuration for us. Since its a normal module we can change the settings in the ui and hit 'store in config'

- Last but not least you could use the api /Administration/config/:category  to set a config variable in the database that you read in your packag when you want. 

and which table in the database /Administration/config/:category  is refers to,please?

the administration class stores data in the config table. The category is to distinguish your setting for other settings with the same key. 

Thanks a lot!

Thanks a lot!

If you want to retrieve the value you should use the Administration class : support.sugarcrm.com/.../