Current user map entries can be listed with

GET 'https://127.0.0.1:8096/api/v2/connector/configuration/module/userMap'

The output will obfuscate passwords and look like the following:

{
    "payloadType": "TungstenPropertiesPayload",
    "payloadVersion": "1",
    "payload": {
        "app_user": "% europe null",
        "other_user": "% europe null"
    }
}

In order to create a user in memory, the password and data service name will have to be passed as a url parameter:

POST 'https://127.0.0.1:8096/api/v2/connector/configuration/module/userMap/app_user?value=secret europe'

Note that after this call, the user map only exists in memory. Persistent storage to disk will need to be done as follows:

POST 'https://127.0.0.1:8096/api/v2/connector/configuration/module/userMap/writeToDisk'