REST API:Obtain a Session ID

From LongJump Support Wiki

To obtain a session ID for use in making a REST request, there are a couple of options:

Use the getEnv from with the platform
For methods running inside the platform, use the Java getEnv() method to obtain the session ID:
String sessionID = Functions.getEnv(ENV.SESSION.ID);
Programmatic login
Use the code from the Sample Login Client to programmatically log in and obtain the session ID from the response.