Set ElasticSearch credentials and create ElasticSearch connection object

NTSPortal credentials are used to build the DbComm interface to the database. If no credentials are available a pop-up will ask for user input (in interactive use). Uses the `keyring` package to store and retrieve credentials. The default `keyring` backend is used. When working on Linux in the console, this is the 'file' backend, on windows, 'wincred'. The backend can be set manually with `Sys.setenv("R_KEYRING_BACKEND" = "file")`.

Usage

connectNtsportal()

Details

Will additionally create the `escon` connection object in the global environment for use by all functions (deprecated, use DbComm interface)